Any photographer who complains about a lens being heavy really needs to invest in a set of weights. Yes, carrying an addition 10 lbs can be cumbersome... but seriously... man up... or lady up if that is the case.
I'm in fairly good physical shape, and weight is a pretty big deal. Try carrying a 50L, 85L, 24-70L, 580ex, 5D, and tripod for a day trip that requires a lot of walking..... of course weight matters.
on a trip like that, I can carry a 5D, 24-70/24-105, 580ex, and tripod. I carry my camera with me on every single outing, and my normal kit is a 5D, 270ex, and either pancake or nifty fifty. Seriously, you're fooling yourself if you think weight doesnt matter.....
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