Heck! Write to Jemaine! He's good about writing back and answering questions. He answered my query as to the hair situation in the commercials, after all.
I wouldn't be surprised if he did do a lot of the writing. I'm sure they had a basic plan for the commercials, but then let him flesh them out a bit or something.
ETA: Or you know. Maybe he didn't.
(I just read Gayle's post and I bow to her knowledge.)
"It was a hilarious, hilarious moment in a very bleak, bleak time of my life."
Happiness is Bret-Shaped.
"The forecast for Jemaine today is clean-shaven with a chance of stubble. Scattered stubble throughout the week, resulting in a 60% chance of beard early next week." - mohumbhai mania