I stumbled across this this morning after talking with some co-workers about what we're seeing

http://code.google.com/p/chromium/issues/detail?id=85229

I'm wondering if someone @ MS decided IE9 would benefit from the same speculative pre-connect sockets. If we strip out anything that's not IE9/Chrome we're left with a pretty small subset of 'other browsers' which I'm leaning towards considering outliers just by virtue of being < .5% of the overall error count.