IMO its not so much the amount of torque but the way its delivered, that causes torque steer.

To reduce it i reckon it helps to have adjustable TCA's and to get the torque to be produced progressively but increasing as the revs and speed rises.

not like most T3 turbo'ed RST's where they produce ALL of their torque very quickly at around 3000 rpm and coupled with a diff thats trying to put the power down it throws you about on the road