I would guess cynical— that the market does not have much faith in Bernanke expressing his faith that the economy will eventually recover, and when it does, that the Fed can then ease off the QE (aka printing money). Some folks believe that most of the employment numbers are artificially rigged by powers that be, and tying QE to a statistic commonly believed to be rigged is not something that is going to engender a sense of stability and returning normalcy to the market— rather, it could be a code for a long term prognosis of no actual change in fed policy regarding qe, iow continued qe to the indefinite future.
i am a cynic, jmo...
more discussion here
Bernanke just now: “Between 5%-6% unemployment is what we consider to be “Full Employment”
http://www.freerepublic.com/focus/f-chat/3033267/posts