its more a combination of tyres, road and amount of water as some others have stated rather than the car itself, be it all wheel drive or rwd. Ive had the front of my 33 aqua plane for a sec while the rears still held grip where you would first expect it to let go.
+1 for just slow down and adjust your driving to the conditions. I was in traffic on thursday in melb when we had heavy rain and hail and the like and theres people flying around and tailgating, speeding and swerving like it was dry. I guess nothing bad has ever happened to them in the rain, YET.