As a Niner's fan, I don't think it's really possible for Gore to get much more than 10 or so TDs in 2007. Despite what Gore was able to do last season, there really isn't much scoring opportunity in SF right now with the current state of the passing game. As studly as Gore was last season, he only managed to score 9 TDs on almost 400 touches. And I can tell you, most of those yards came between the 20s, and probably the majority was on our side of the field!
Alex Smith did a lot better than 2005 when he was a rookie, but our passing offense is still poor. And all our new acquistions are just that: new. Jackson and Lelie both haven't been practicing, and we lost our #1 performer from last year in Bryant. Jason Hill is not going to come in and make a huge impact, especially when you consider that he is probably not in line to be even the 3rd WR right now. Even if Vernon Davis does breakout and become that stud TE, Gore will probably losing catches as a result. Bottomline, Gore doesn't have the bigtime upside of say a Shaun Alexander or even Rudi Johnson in the TD department.
And it's not crazy to project less performance in the yardage department as well. It should be expected. I personally don't think Gore is worth a very early pick when you combine his lack of a big upside versus the risk associated with both losing Norv Turner and playing on a poor passing offense. Some people have him as high as #2 overall, but I think he is a much more appropriate late first round pick when you consider the risks involved.