I now have iPad2 (A5 dual 512MB ) and iPod4 ( A4 solo 256 MB ), both loaded with iwork 1.5 and iOS5 . Let me report :
I think Apple accidently have optimized iOS5 and apps too agressively for the A5 processors of ipad2 and iphone4s. - ipad1, ipod4 and iphone4 run on the A4 chip.. and these are the devices that lag the most.
My keyboard is set to german plus additionally 2 international keyboards, so I can switch input characters when typing.
From what I see : on pad no typing issues so far - all can be left as it is.
iPod had severe issues in typing. SO I started digging around ( I even restored iOS on it it, but no cure ).
To make a long story short -- in iPod4 it helped succesfully to
disable the auto-completion and auto correction features in the keyboard settings and do a reboot:
where you can shorten often used phrases like: "otw" = "on the way" - I hope you know what I mean. Delete them all. Pages seems to lag on the iPod in such a way that it tries to foresee what I am going to type, "thinking" if it is a sentence or a phrase and if it needs correction.. The A4 cpu ( same as in iphone4 ) seems a bit overloaded with this. And to make things worse the tight memory of the iPod adds to the bad performace. The iPad2 has a faster processor and double the Ram ( this would match also the iphone4s hardware ) , and like I said the issues there are non-present for me on the pad.
Additionally it helped to limit spotlight search radius, so that it not constantly monitors changes in the device ( apps,contacts and music only for me - as these do not change that often and with a one time index it is done).
iOS5 is buggy in very few features, but there heavily. The high cpu/memory usage, the fast battery draining are the worst. I positively see the 5.0.1 update coming soon to adress this. Reports from Developers and a vague anouncement from Apple to adress "battery life" soon indicate there is help on the horizon.
