Wheels are
OK, I recently used one when racing a Truggy. Although a stick just seems more precise to me. The states is mainly wheels, Japan seems to be a 50/50 split and here in the UK its mainly sticks. Most of the RTR stuff is ultimately made for the US markets so it will most likely come with wheels.
This weekend I got my lad racing with both sticks and a wheel, and I'm glad to say he preferred the sticks.