Practically speaking, you may be right, but the Shimano 7901 chain seems to come out on top all the tests I've seen. I think friction facts rates it as the lowest friction chain, and tour mag rated it as the most durable. http://www.tour-magazin.de/services/...11/page45.html

If you care about that sorta stuff, get a Dura-Ace CN-7901 (I'm sure they're cheap now that DA9000 is out). If you don't, then buy whatever is on sale.