No, i noticed that if i ma with zooms.. one zoom range will be fine but the opposite end will be out of wack.
At least in my experience it did..
My copy is sharp, i've posted samples of it.. but not $1200 sharp.
Maybe i'm just so used to shooting with my primes lately :/ The uber good copy of the 15-85 IS i had didn't help either
You got used to primes then. Hold on to your 24-70 if you're going to be getting into events like weddings. I've done whole weddings with just that. Makes an awesome backup lens. Or a 2nd shooter lens.