Let me just say, Ross Marquand, a.k.a. Aaron, does a flippin' spot-on Matthew McConnaughey[sp?].
He does a ton of impressions. He actually stars in a YouTube series called "The Impression Guys" on the channel, SoulPancake.
I embedded the trailer in this thread a few weeks ago. The show its pretty funny.
They actually just started posting episodes from season 2 a few days ago.