Of course not, because there was no reason to see Sanchez's performance showing coming. Sanchez has never shown the ability he displayed tonight and had put up 3 TD's to 8 INT's in the last 6 games. Putting up the performance he did, in these sort of conditions, was the sort of moment that was needed for any fair minded individual to see the potential in Sanchez that validated his high draft status.
I can now see Sanchez as a franchise QB, though he's obviously not become one yet. Before tonight the only basis for such hope was charisma and college tape.