I believe you. But the reason may be independent from iOS 6.
In my case, I was entirely ready to upgrade my aging iPhone 4 to an iPhone 5, along with my son, to whom I'd long ago promised an upgrade. Well, I ended up upgrading his line only, figuring I'd save the bucks and stretch my iPhone 4 for a while yet. The only problem was, my phone's home switch had been getting super-cranky over the past couple months, needing multiple presses and basically being unresponsive. That upgrade was looking necessary.
Until... the misbehavior stopped this past weekend. I have no idea why. No software changes, no "recalibration" attempts, nothing. Now, I did drop it, but it wasn't much of a drop and the landing surface wasn't super-hard, but some folks contend that a good whack has solved their button issues, so maybe that's what it was?
One way or another, the button issue is resolved for now, and I thank whatever did it.