There is a setting I believe (I've only seen the screenshots - I didn't install iOS6) that enables iOS to use 3G if it detects the WiFi is bad. Could this be the case - your device has a terrible/slow/laggy WiFi connection and it decides using 3G would at least lead to a more stable internet connection?
I'll check for this setting. However, I don't think the WiFi connection is slow at all. The WiFi goes to a corporate network with 100 Mbps dedicated connection to the Internet both up and down. Something is definitely amiss. Btw, iOS 6.0.1 does not fix this issue.
I'd hope not. He's dead.
That has never stopped any (dead) people from Chicago before.
"What the scientists have in their briefcases is terrifying." -- Nikita Khrushchev