[sk8ram]

I think the previous post summed this up nicely.

At lower limits, playing very much textbook and pure odds based / value betting will see you as a solid regular winner.

As you move up, using more knowledge based on reads and instincts is a requirement, and this also passes over to short handed and especially heads-up games.

However, you generally only gain good instincts about stud by playing and winning at it a lot, which has a sound theoretical background as a prerequisite.

So I don't think the big winners lack the probabilities and odds they needed at lower limits, but have simply developed and evolved to play a higher limit where instincts become greater in importance.