The reason why I no longer place any trust in mock drafts: I just saw one with the New England Patriots draft Quinton Coples with the 32nd overall pick.

I saw one mock on ESPN that had us taking the Center from Wisconsin (Peter Konz). I thought that was an interesting pick, a new Center that hopefully becomes our next Kreutz (heh even their names are similar), and we could move Garza back to guard.

Yeah, right now they're a hoot. They just finished the Senior Bowl and some guys stock probably rose by one or two rounds from that and for others it may have dropped by as much. The Combine and the interviews there will be even more defining.
I remember following the NFP Draft Rankings last spring and there is a massive amount of shifting around that takes place after the top ten. So much of it will be influenced by a teams primary needs after free agency. Last year it was easier to predict because there was no free agency prior to the draft so the draft was the only source of filling holes. This year it's back to the norms.
I think the classic example of what you're saying Zelezo is how much variation there was in Carimi's rankings before the draft. At one point they had him going in the late teens (#17-#20) yet we still get him at #28. After his Senior Bowl performance there's no way Coples will still be around when the Bears pick at #19 let alone the Pats at #31 or #32.
I'm getting to that age where a lifetime warranty just doesn't mean as much to me anymore as an afternoon nap.
Honey Badger Don't Care. Honey Badger Don't Give a Shit.

I totally forgot there for a bit that this year's draft will go differently. The Bears could trade someone of value from the current roster as well as one of the third round picks and get somewhere in one of the first two rounds. We couldn't do that last year. Also, about every mock draft has the Cleveland Browns trading up to the second overall pick to get RG III and the Rams trading down to get Justin Blackmon at the fourth pick. How they know this will happen is anybody's guess, although the concept that both teams would be meeting needs by making these moves certainly looks reasonable.