Be interested to see the power consumption figures on a windows machine as opposed to a mac...
It's at least a popular belief, if not completely true, that Mac+flash is slow because of apple's uncooperative behavior, and Linux+flash is slow because adobe doesn't care.
See these discussions: http://news.ycombinator.com/item?id=1075440 http://news.ycombinator.com/item?id=1139393 http://news.ycombinator.com/item?id=1138266 http://news.ycombinator.com/item?id=1100189