And their 3rd iterations of iPads?
The iPad 3 was a disappointment to everyone and was replaced fast with the iPad 4 and was never talked about again by Apple. Now the iPad mini 3 just the same as the mini 2. Do you think Apple is going to pull an iPad 4 with the mini?
The iPad 4 introduction was for more than just poorer performance -- it was to also introduce the lightning connector and get the iPads onto a Fall update cadence. And while it was a bit early, it was still 7 months or so until they released it.
The Mini 2 (and as a result, 3) aren't poor performers, already have lightning, and is on the same update cadence. With Touch ID, they have most of the same core features. I think they did little to the Mini to partially devalue the option and push the higher-margin 9.7" iPads -- very common marketing tactic.
I don't think we'll be seeing an iPad Mini 4 until Fall 2015, at which point, it'll probably get an A8. I don't think we'll ever see the 9.7 and 7.9 iPads with the same chipset at the same time again.
For what it's worth, I'm also in the boat that I don't think we'll see a iPad Pro release until WWDC 2015 at the earliest, in June/July. Love to be proven wrong, but the lack of part leaks doesn't bode well, imho.