I just now finished a survey that turned out to be about tires...it was a Daily Survey through Greenfield, but was an OTX. Because it was OTX, I made sure to do the age thing (they seem to only look at YEAR, not month, so even though my b'day isn't until October, I put the age I will be then, to make it match up when they subtract birthyear from 2008), and it seemed to go through!

So be aware that just b/c you're going through Greenfield, be aware who the survey is from, so you can make them happy with your age (even if it hurts you, LOL) for the system that isn't up to speed.

At one point in the survey it even asked for my birth month, but STILL I wasn't booted for age reasons like I think I would have been if I'd put my current age on that first page of the survey.