I don't go to the extreme that Chase suggests (QBs in the 15+ range). I usually try to fill out a roster with 2 QBs in my 10-15 range. That is, once most every other team has their starting QB, I usually have my pick of the remainders. I then pick the best two on my board. And often times, I can wait for one of them because their ADP puts them around QB15+ for the other teams. I once tried to wait for both QBs per ADP, but got screwed as there was a run on QBs. There was no logical reason for teams to grab back up QBs, but it happened, and it made for tough situation (I had to work hard to trade RB/WR depth for a serviceable QB). Don't assume everyone is rationale. So I always try to grab at least one QB I feel comfortable with before really getting deep at RB and WR.
Once I do get one QB, I will use the "Complementary QB" feature in Draft Dominator to help me pick a second QB if it is close. For example, if I draft Roethlisberger and I have Eli and Lefty with similar projections, I'll let DD help me decide between the two by seeing who has the best schedule match.
As an example, in the one, intense league that I play, I am going with Roethlisberger, Hasslebeck, and Schaub. Not a QBBC as Chase defines it. But the combined amount that I am paying those two QBs (auction league) is less than what was paid for Manning and for Palmer. To me, in an auction league, the QBBC principle means picking up a number of QBs at low prices for the same price as one of the studs. It better protects you against injury - all your eggs aren't in one basket.
That being said, I HATE the agony of picking a starter each week. It's not as easy as following Chase's outline or looking at the SOS. And the FBG projections usually don't help because the projections are usually within 1 point of each other (these are closely rated players), so it's a crap shoot. I suffered last season as I continually picked "wrong" between Roethlisberger and Delhomme.
I am already fretting about whether to start Hasslebeck v. TB or Roesthliberger v. CLE in week 1 (both good matchups). And its only week 3 of the preseason!