scuwp: Done kids iPad2. Did it OTA and it took nearly 1.5 hrs but all seems well. My impression is it is a bit zippier.
I am interested in how this goes for your iPad 2. I held off installing iOS 8 after reports of it turning the ipad2 into a dog. If iOS 9 gives it a new lease of life, all the better. I recognize that it is getting long in the tooth in tech terms, and in fact was quite surprised when it was included in the list of devices able to be upgraded.