I agree with RoadieGal. The hassle of taking off a wetsuit is not worth the speed you gain for wearing one in a short race. I think this hold strue if you're comfortable in the water. A wetsuit does help swimmers who are nervous or less comfortable because the bouyancy makes you feel like you're not so at risk. So, if you're not comfortable in an open water swim I would use one because you'll waste less energy in anxiety and effort of swimming and it will allow you to do better on the bike. If you're a very confident (note I did not say fast) swimmer, I'd go without.
I'm very happy swimming in open water but I still use a wetsuit for races longer than a sprint because of the effort and comfort factor.
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2007 Look Dura Ace
2010 Custom Tonic cross with discs, SRAM
2012 Moots YBB 2 x 10 Shimano XTR
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