I feel like the iPad 4 and iPad mini were almost more of a little bump though, so maybe major releases are more prone to release earlier.
iPad 4 was definitely a tiny bump, what difference does it really have over the 3 other than a bit of a faster processor?
iPad Mini, while a new device yes, is just a smaller version of the iPad 2. It's nearly a backstep other than it's size and LTE, and size is opinionated really.
I do think they will probably go with the mini's design build for the new iPad 5, but not sure what else they can really add in, I'm assuming as far as hardware, the new design will be their biggest thing.
People keep asking for a Fingerprint scanner, but what will that really do anyway? It seems almost gimmicky, not sure why that would be an /important/ feature to somebody, unless websites and such started integrating fingerprint scanning as an alternate method as a password, then it would be pretty useful.