Yes, THE Thomas Keller.
In case you don't know who I'm on about: http://www.frenchlaundry.com/tfl/tflthomaskeller.htm
As we passed him (standing with his 2 staff, one of whom had been seated in the seat in front of me on the plane) at the off-site parking shuttle stop, on our way to the long term parking shuttle stop, I asked him if he was the famous Thomas Keller, and he said no. :P
I don't know if he was lying because he didn't want to talk to a fan of his work at 1am on a darkened SFO sidewalk, or if he was being modest. ;-)