It's not an irrelevant stat and you disproved nothing. Sure, a couple guys who are either better than Ivory and/or in better situations were able to score 10 TDs with a similar number of red zone trips per game. That doesn't mean anything. Ivory is moving to a team that has little to no passing threat near the goal line on the off chance they actually make it there. It is going to be tough sledding for him. And yes racked up a few long TDs while on the Saints, but I suspect he'll find the defensive fronts are going to be a bit different without Drew Brees around. Plus, I think you'd find a lot of players score half their TDs away from the goal line. That doesn't somehow mean that they don't need goal line carries to score double digit TDs.
As for your rebuttal about defensive yards per game, pointless. No one cares how many yards they gave up. If your crappy offense is playing from behind, Ivory probably won't be in the game. I like your optimism, but let's face it, you are relying on rookies for your defense to get better and you just lost the best CB in the game. It had to happen - he was asking too much and coming off of injury - but you still lost him. Bart Scott was not good, either. But that doesn't mean his replacement is going to be better. I won't be shocked if the Jets go 4-12.
And as someone else pointed out, Greene simply compiled stats by playing all 16 games. He finished the year as RB15, but his points per game were not very impressive. Plus, he was not in a timeshare. If Goodson isn't cut for behavior, which I don't think he will be, then he's going to have a much more prominent role than Powell did last year.
I certainly wouldn't be shocked to see the Jets go 4-12 either, but not sure that's entirely relevant to this topic. Is you stance that RBs on bad teams perform poorly for fantasy purposes, because I'm sure that can be quickly rebutted?
As far as some of your other statements, a team is in trouble if it it relying on two top 13 pick rookies? Really? I could give you many examples of impact rookie defenders if we need to go there as well - especially at CB and DL.
Once again - the Jets defense isn't terrible. Yes the statistical trends are downward - but some of that is due to 27 turnovers by their QB. That's going to change one way or the other this season. Sanchez will improve in that aspect or Smith will see the field. By no means do I expect the Jets to be an offensive juggernaut, but with just adequate QB play they can be decent. Holmes will be back, Hill should improve in year two and showed flashes of big play ability (albeit with inconsistent hands), and Jeremy Kereley is a good slot WR. Holmes and Kerley have the quickness to thrive in a WCO - once again assuming adequate QB play.
You also claim Greene put up his numbers without being in a timeshare - a quick look at his career will show that just isn't true either. He's always had another RB in the mix, even last season Bilal Powell received 110 carries. and was used as the 3rd down back. Greene did see 276 carries in 2012 so, yes he was the main ball carrier. Ivory may not see those 276 carries but he is a much more explosive back than Greene and I'd expect him to be better than Greene's 3.9 ypc. He has better speed, more power, and more agility than Greene.
The Jets feature a better than average o-line and (on paper) and should be improved there as well. Ivory, Goodson (if he sticks) and Powell all have potential to move the ball behind a decent line - and in a WCO "stacking the box" is a very dangerous proposition as a quick slant or dumpoff can become a big play in a hurry with no safety support.
As far as the ppg v. season long stats argument. I certainly understand the premise, but at RB solid every week production isn't a bad thing from your RB2. Would you rather have a RB2 that averages 12 ppg over 16 weeks or a RB2 that averages 16 ppg over 7 weeks?, bearing in mind of course how difficult it is to find RB production on the waiver wire to replace you injured starter. This discussion is also irrlevant, as well though, since none of us know whether Ivory or any other RB are going to miss games and if so how many - sure we could speculate based on past injuries, but we all know that RBs are healthy, until they're not, or that RBs that were once considered "injury prone" went on to churn out multiple healthy seasons in a row.
You call it "hype" if some one feels differently about a player's chance to succeed than you do. Others may just call it a different opion or a projection. I don't see many people getting carried away here in this thread, unless of course in your mindset predicting 200 carries for a RB is getting "carried away".