The 3 most productive games Dez had as a rookie were with Jon Kitna at QB including his first 100 yard game. It took awhile for Dez and Romo to develop chemistry. Dez didn't have his first 100 yard game with Romo until week 4 of the 2012 season.
I liked Kitna enough.
Still, I'm sure it was mostly to do with the absolute obvious....that Dez was a rookie WR, and they usually take at a minimum half a season to get going.
Also, when Wade was let go the whole team that had quit on him finally lit up...so no telling how great the second half of that season would have been with Romo.
They were a different team energy-wise with a new coach that year.
Having said that, for Dez has helped Romo on many, many occasions--which is what you expect from a WR now making 14 mil per year.