10 minutes? That's it? That's barely time enough to get introduced, let alone get solid, specific advice. An instant reaction to my start-up might be nice, but it won't be substantial information that I could truly act on. He would probably just have to fall back on the same information that I could find on his blog or Slideshare in order to fit into the 10 minute window.
However, 30 minutes or more, and I'd definitely consider bidding.