Soviets do, but USF doesn't really. USF needs quite a bit of luck in early OKW 1v1:
a) location of Spios
b) first fight
c) long/close range firefight
Just try not to engage into fight until 3rd rifleman is on the field. And toy with OKW with m20+stuart.
I was one of many who claimed we should nerf stealth-moving rackt, but after many nerfs OKW got and doomed mech truck start; they are just too vulnerable in early-mid game against vehicles.
Of course things get better after first p4, but it's really tough to keep up the pace w/o proper vehicle.