every time i have upgraded the os on my ipad 1 i have noticed a resulting overall slowness in the browser.
it has recently come to my attention that the upgrades are tweaked for the processors of the newest ios devices and running the upgrades on older devices results in problems.
when this occurs the natural solution would be to downgrade to the previous ios and resolve the problem.
however, apple does not allow that and while it has some good reasons to do so the downside is that many devices are forced into obsolescence.
there are workarounds for these problems and they are sometimes specific to the ios versions you have on your device, but, from what i have been reading, apple is making it increasingly difficult to downgrade unless (in most cases) saving files using specific software and then jailbreaking to restore the previous os.
luckily ipad 1 is running 5.1.1 so needless to say i wont be upgrading. i also deactivated notifications, messaging, email, location, etc and the thing runs pretty well.
this will most likely be the last apple product i will buy. obsolescence is a given in this day and age, but when a manufacturer exceeds its authority in helping the process along i say 'include me out.'