As far as I know, Bulldozer has more stages on the pipeline, lowering IPC but allowing for higher clockspeeds.
I worded it wrong. What I meant, is that they are massively behind in games that are CPU bound. Crysis Warhead isn't particularly CPU bound.
the pipeline is also wider. clocks higher and its not a p4 length pipeline. Estimates I have seen are 17-19 stages, not 30+ like p4 and to some degree more pipeline stages can actually increase ipc if the scheduler is done properly.