Was it all but Cavendish riding for Sky? Under the tutelage of the Brailsford brain trust?
Thus far, one day races have not been something that Sky/BC seem to have figured out. They haven't really demonstrated a great amount of tactical nous over time if we're honest. Their tactics even in their biggest one day success, Cavendish's Worlds win, were the same as their stage race aims:
1) have strongest guy in race
2) ride at the front all the time to control it so they can finish it off
Who of the Great Britain team has a great one day palmarès? I mean, Cavendish has a monument, the Worlds, a semi-classic (KBK) and The Worst Race In The World®, but the Firenze Worlds were clearly not to his taste. The only rider in the GB ranks who could reasonably be considered a puncheur is Tiernan-Locke, who was withdrawn from the race for reasons we are by now all aware of, and who hadn't shown anything like the requisite level to compete at the race anyway. Froome? Perhaps, but the climbs that were steep enough weren't really long enough for him to make the difference, and he has been chronic since winning the Tour anyway. The likes of Thomas, Stannard etc. are more for a more rouleur-type race, and it would have required some incredible tactical genius for the Brits to have got themselves up in the mix on this one, in retrospect. Edmondson and Rowe are too young (and the course didn't suit Rowe) and inexperienced to have been anything but domestiques on the course (Rowe did his job pretty well, no?), and Cummings was ok but nothing more.
The big problem is that:
1) Sky/BC aren't really all that tactically adept; with strength in depth and stage racing this can be masked but with one-day racing, and no reason for competitors to 'wait for the next day' and much more aggressive racing, this shows them up and their lack of success in one-day races has been notable when you look at their dominance of whatever stage races their A team go to.
2) Sky's riders who are capable in this type of race are not British, and the British riders who might be good at this type of race either haven't gained enough experience in racing them, or have seemingly been badly behaved.
Edit: a bit harsh on Stannard to say that it didn't turn a single one of them into a hard man. Just finishing KBK 2010 is a sign of being a hard man, let alone being in the winning break.