I wouldn't be surprised if they meant that a lot of older Macs were still in service -- 1/2/4 meg Macs and the like. I wouldn't be surprised if today's "average" Mac (although to be fair I bet they sell Macs way faster today than they did twelve years ago) has about 512mb of ram in it.

The article was pretty good, mainly because it presents a cool thought I hadn't seen about Apple before, that they were going out of their way not to step on the toes of their developers, which hurt them more than anything else.