The funny thing is what changed between this year and last year? Last year most drafts had a bunch of QBs go in the 1st & 2nd round (including Rodgers possibly #1 overall). This year everyone is going RB heavy again and Rodgers is going in the 2nd.
The RBs being drafted in the first round last year were AWFUL overall. Aside from maybe three of them, they all had serious question marks that made me question why they were first rounders at all. Last year at this time, McFadden, Mathews, and Murray were all first rounders. This is why smart people stayed away from that risk and went with a safe QB in round 1.
The awfulness of the RBs in round 1 was paired with a TON of upside in the mid round running backs. Guys like ADP and Charles in round 2, the guys like Spiller, Martin, Bush, Ridley a few rounds later.
Last year was very much an outlier because of the above situation. This year a lot of those great mid round RB values have propelled themselves to first round status which brings us back to the usual RB heavy early rounds. As a result, there is all of **** and crap available in the mid rounds at RB. Gotta scoop them up early this year.
You should never go by an absolute "never draft a QB or XXX position in round 1". You have to look at each year individually.