Well, Nick Heidfeld has given a frank assessment of where he thinks the Red Bull is based on his testing observations. He goes into a fair bit of detail actually:
http://translate.google.com/translate?j ... l=de&tl=en
Sorry, it's German translated to you have to read everything at least a couple of times to get the meaning. The word 'frightening' is even used in there, so that's clear.
Even if the speed is there as Heidfeld thinks though, I'll be suprised if they don't have a few retirements. They can't just paint over their testing mishaps in a few weeks.