hereandthere - We did it in the beginning of July, last year. We left Whitney portal at 3:30am, got to the base of the climb at 7:30. Started up the route by 8am. Topped out at around 1. Had lunch and started down at 2pm. Arrived back at the portal at 6:00pm and we were bummed that they stop serving french fries at 5:30 at the Portal Store.
Conditions were dry, so add more time because of the snow.
We are doing the East Butt of Whitney on June 5th. When are you looking at doing the East Face?