I had the opposite, had new corsa's on my track porsche and the guys who fitted them (protyre mobile fitting, big race wagon at the circuit organised by Porsche Club GB, good outfit and tyre fitters who support the Porsche Cup race series so not amateurs, and very well known and respected and good guys) said one of your wheels is buckled, sure enough steering wheel was wobbling on track, not a bad buckle but like a bad balance, I even fancied I could see a slight buckle when I jacked car up and spun wheel by hand.
(wheel was good before the new tyres)
So yesterday I took my GTI monza's into Lepsons Swindon yesterday for refurb, while I was there I said can you straighten the buckle on this Porsche wheel, off they go, 20 mins later they come back, no buckle, the tyre is slightly misshapen, the wheel has a very slight imperfection from round in one place, and the balancing weights were all over the place, but def not a buckle, they showed me on their fancy machine, the guy was an expert, whilst I was in reception they were taking trade bookings from ferrari, Porsche and BMW for wheel straigtens and refurbs, 10+ tyres at a time, the reason for a wobble was a bad balance, so the rebalance (for free) and send me on my way
top service from Lepsons
and moral of the tale, is could be either (bent or balance) but get a couple of opinions first before you weigh into anyone for bending your wheels!!
I would guess a crap balance (or tyre problem) is much more likely than bending a wheel unless (perish the thought) they mixed your wheels up with others!