RWD generally gives better weight distribution and the ability to put more power through the driving wheels without the effects of torque steer.
The benefits of FWD are cheaper manufacture, better packaging, giving more cabin room, and the fact that as the weight of the engine is over the driving wheels, better traction in snowy, muddy conditions. In fact, equipped with a decent set of winter tyres a FWD car can go most places a 4WD soft roader can go.
Contrary to comments above, most ordinary cars of US manufacture are FWD as buyers in States likely to experience snow in wintertime prefer them.
During the recent snow my Lexus struggled compared to the wife's Audi, as did the other RWD Jaguars, BMWs and Mercs I saw. I still wouldn't swop back to FWD for the other 360 snow free days though.