I just filled out the online survey about the first playtest materials I got for D&D Next. I manage an office that conducts market research, so I have a lot of experience with surveys. This one was nicely executed, not too long, and with enough open ended questions to allow me to feel like I had communicated everything I wanted to about my reactions to the materials.
One thing the D&D Next material has done is make me want to get out the materials from my long defunct 3e campaign and maybe run a one off session or two in the orcish lowlands with the characters from the playtest. I always statted up my 3e creatures in a stripped down format basically identical to the monster format in the playtest. I have a ton of low level material that would be perfect to throw against the pregen party. Maybe this will even inspire me to finally get on the Google+ gaming wagon.