The edge in poker is a lot smaller than most think after considering the rake. I would guess that it's somewhere right around .5% after rake for most high stakes pros.
This is a graph of 32,000 coin flips. Each line represents a gambler who has a 50.5% chance to win each flip. As you can see, there can be wide differences in results between two gamblers with exactly the same skill level.:
Here is what a 51% edge looks like. Same thing here. Wide differences, same skill level:
And 52% to win each flip. With a 2% edge you pretty much never lose over 30k flips:
53%.:
And finally, let's take a look at 50.25% to win each flip:
