So, I've never ridden disc brakes before, and just bought a bike and had Avid BB7s installed by the shop. I broke them in (rode about 40 miles in 4 days or so, with some intentional stopping thrown in for good measure, way more than the 40 stops that Avid calls for), but they still feel like average-to-bad caliper brakes. I can't lock up the rear wheel on the hoods, for example. I was expecting awesome performance (do a stoppie with two fingers ), but this is very underwhelming. The shop doesn't seem to really think the performance I'm getting is abnormal. Is this really all I can expect from disc brakes on a road bike? Because, if so, I'll probably just throw some linear pull brakes on there.