I have been noticing lately that the "purchased" and "updates" sections of the AppStore are agonizingly slow to load, though the "featured" section comes up much more quickly.
It should be noted at this time of year the traffic on the Apple servers is massive which in turn may cause issues. I personally have had no issues with ios6 causing slow access with the Apple store but there again I am in Australia. I do access both the US iTunes and also Australia iTunes stores.
"Everything slow down"? that seems a very sweeping statement. My iPad on iOS 6 seems nice and fast. Are you experiencing this slow down yourself or is it something you read somewhere that has caused you to worry and you think your worries need to be shared with us? Can you be a bit more specific and tell us exactly what aspects of your iPad have slowed down presumably due to an upgrade?
Not on my end and many others here, Vincent. Actually, since ios 6, loading pages have been faster since. Maybe you have something going on with your iPad that its slowing down like that.