Just recently put on two Goodyears. Had a flat so replaced the two on the same axle. With just 2 out of the 4 being Good Years, I immediately notice how much better the 5th pulled. Will be replacing the other 2 soon. Can't recommend them enough!
Also, not sure if it is BS or not (don't shoot the messenger!), but the tire guy at discount tire told me ST tires had a different rubber compound that were designed to sit idle for long periods of time, whereas LT tires needed to be driven. Made sense to me...