So if i played a 1/2 heads up game vs a fish with 5k and he had 50k (100 bb buy ins ) you're saying he has a distinct advantage on me? I think not. I would end up 50k richer if we played enough. The player with the most skill has the distinct advantage.
It's a well-known fact in the NL poker world that the person with the higher BR generally has a distinct advantage over the one with the smaller, assuming that the two players possess equal poker skills. This is what he was trying to say.