The question is a verry tricky. At the
freerolls,
when begins all in pre flop, the luck preside (skill also preside), (just drop it and watch, there is nothing to do), everything can hapend. The skill, more or less, is game for postflop (luck preside too, so, they go hand by hand, can't escape it).
Last night i was a witness, how many "big
hands" fall down at the
all in batle: AK vs QJ; 99 vs QQ and so on.
And last but not least, there were also many quality games after the flop (last night)...
(Oh, i forgot for the strategy: well, I prefer to have no one in front of me when I push, and mostly "good hands" are played. )