[RonDog]

From www.fancast.com:

...While those at home may have had varied reactions to Palin’s appearance, the studio audience ate it up.

The cheers were vociferous throughout her time with Leno, an indicator that Leno likely brought in millions of Palin supporters during last night’s broadcast.

If that’s true, then both Leno and Palin won last night’s game.

[RonDog]

From LandLineTV (via YouTube):

Leno Gets His Audience Back

So, THAT'S how they got in!