It is a complete myth that FWD would be better in the snow. It is a generalization and true for most cars, just because they have more mass over the front axel than at the back.Thats because in a standard ICE the engine and transmission are the heaviest parts and in the front, most of the times, its a different story with a VW Beetle for example. As soon as the wight distribution shifts to the back, rear wheel drive is better. With a 50/50 weight distribution, both are equally good at low acceleration, but if you accelerate the momentum shifts weight back to the rear wheels.
Its just basic physics. The acceleration forwards can't be higher than the powered wheels static friction times the mass applied on that wheel divided by the vehicle mass. Once you overcome that point, the wheel starts to slip and it does not really matter if the front wheels slip, or the back wheels, it only decides if you go forwards into a tree, or backwards.
Sure, acceleration in FWD is worse in snow. I like FWD as it is more controllable than RWD when slip occurs. With RWD all you can do is let go of the gas and steer towards the direction rear wheels take you. FWD cars tend to go straight when they slip.