The argument that RBBC -- or, at least, drafting a backup RB high when you have a stud -- is nothing new, while true, doesn't really address the comments about this rookie draft being unique.
This might just be selective memory, but I can't remember a year in my 8-10 years of dynasty play where there wasn't a single top rookie RB who obviously had the inside track on the starting job the instant he was drafted. This year there is only one, McFadden, and that's somewhat arguable given the crowded Oakland backfield. Factor in the complete mess at WR and the somewhat messy QBs, and it will make this year's dynasty drafts more variable than any I can remember. McFadden's the consensus #1. After that, who knows -- the next 3-4 RBs can arguably be picked in any order, the WRs will be all over the place, and even the QB order can vary widely. It's a unique situation.
Personally, I've got the #3 and #8 picks overall and I'm really scratching my head at this point. I'm fairly lucky in that I'm pretty stacked and young, so I afford to just draft straight best player, or feel out trades, or whatever, but still. Particularly disappointed with how the QBs shook out. Not entirely sold on Ryan (particularly in Atlanta), especially not sold on Flacco. Brohm was my favorite particularly because I expected him to fall fairly low and I think he'll be the best of the class in the long-run; was hoping he would end up somewhere like Detroit/Chicago/TB/Minnesota etc where he'd be the obvious starter in waiting, but would probably get a year or so to learn the playbook before taking the reigns, but instead he goes to Green Bay to back up or challenge Rodgers... who I've had sitting on my reserve squad for years, just waiting for Favre to retire.
Before the draft, I figured I'd get someone like Mendenhall at #3 going to a team that needed a starter, and could maybe trade down from the #8 to the early-mid second, pick up another 2nd, and get Brohm and a WR prospect. Now I have no idea whether I want Brohm more or less than before (and given our league is located in Wisconsin, I have no idea whether his stock shoots up with Packers homers either). I still like Mendenhall as the #2 RB in this class, maybe even #1 -- but now I'm wondering whether I can move down and still get him.
It should throw a lot of kinks into rookie drafts, resulting in more trades, and probably more picks that will look like ridiculous busts in retrospect 5 years from now.
Just happy I didn't pay a ton for the #3; got it in an early season trade last year, so I was happy it ended up being as high as it was. Time to start seeing if anyone's interested in it...