Nonsense!
Apart from NDA and Flyover.
'it is almost pointless to use the manpower' 30 million people disagree with you I would guess.
'iOS5 has been very well optimized even on iPad 1.'
I am rapidly coming to the conclusion (assumption) that the issue is going to be bigger than iPad 1. It would make sense to approach the iOS upgrade removing products now, but scraping a couple through such as the iPad2 if the performance was just usable on these devices to avoid a PR meltdown.
With iOS 6 shipping in fall with a new iPhone and probably iPad, these would be able to take advantage of Arm's new chips in the foundry using the latest CortexA15 and coincinding with a larger series refresh of mobile processor technology using the new command set coming in Arms offerings. This would give a correlation between the majority of the supported platforms outlined, ie (nothing to do with a4 not being close enough to A5 more what the A5 is missing) and the feature set exposed in the CortexA15.
Thus on release iOS6 will then be the reason to upgrade to iPad (Series 2) Gen 2 as even though iOS 6 will work on iPad Series 1 Gen 2 and Series 2 Gen 1 there will be a markable differential between the experiences which will increasse rapily with iOS6.1 .2 etc as features are excluded from these revisons for the newly legacy machines. Thus although iOS 6 could work as is, it will shortly be unusable on iPad 1 and to allow users to upgrade to iOS 6 but not to 6.1 or 6.2 would cause a greater negetive response to revisions of iOS 6 as they role out. In addition the 3-4 months until release prepares these owners for that upgrade surge so you flip 15 million+ users to iPad Series 2 Gen 2 immediately ostracising the concerns of iPad 2 owners as they are now a minority group and negating the lack lustre iPad new sales. Clever!
Ultimately this will hasten the full transition to ARMv7-A within 12 months of iOS6's release , interestingly this could make a sweet convergence
point for OS X & iOS as this generation of ARM chips would give the Air's chipset a run for their money.
Just a thought!