As much as the crash took out loads of riders, it was with about 1.5-2km left and was about 20 riders back. The guys it took out, were likely out of contention by that stage anyway. Green Edge were powering at the front, and Graeme Brown lead Renshaw and Bos around well.
Renshaw died slightly early (perhaps that 'sprint' work he has been doing instead of the leadout work he has done previous years?), but the train worked fairly well.
Those three doing that together could cause headaches for more fancies teams. Brown and Renshaw would be extremely hard to get off the front inside 1km to go - they hold their positions as well as anyone in the peleton I'd say, and they're both fast with track pursuiting background. Bos is also fast enough to finish it off if Renshaw drops him off 200m out.
If Renshaw helps turn Bos into an absolutely world class sprinter, perhaps the investment in him was worthwhile after all.