I actually agree with this. I have a new Nexus 7, and while I like it, I would trade it today for a current gen iPad Mini. I've refused to buy the mini to this point because I want a retina version, but still, the Nexus 7 just disappointing me. And just to be clear, I'm not an Apple fanboy by any means. I prefer my Note 2 big time over an iPhone for example.
When I first got the Nexus 7 I thought it was very exciting. Finally the retina 7(ish) inch tablet Apple refuses to make. And sure enough, it was beautiful. I wasn't enthused about the tall thin form factor, the 3x4 form factor is one of the things I like about the iPad, but the screen is glorious. Also, I don't really care about the "ecosystem" card everyone plays. For my needs, both Android and Apple are excellent. So, I thought this N7 would be perfect rather than continue to wait for a retina mini.
But as I started using it I started to become more and more annoyed. In most apps it feels like the touch targets are too small. I hit my finger on something and it just doesn't register. I have to tap all around it until finally I accurately hit the target. That never seems to happen on my iPad (3rd generation). Its like my finger is just not accurate. Hard to explain. Also, annoyingly, the pinch zoom is not responsive. I pinch and for like the first maybe 1/4inch of pinch travel there is nothing, then it kicks in. Its like the N7 is spending a split second trying to determine if I'm pinching or not.
Another item is the sometimes sluggish behavior. I tap something and it doesn't respond, so I tap again, only to have it finally respond from the first tap and now my 2nd tap is actually landing on something on the followup screen. wtf?
If I had to summarize the problems I have with the N7 in one word it would be responsiveness. Its just not responsive. My iPad has none of these problems and I assume the mini doesn't either, and therefore, I'd choose a current gen mini over the N7.
I think I'll wait until the retina mini is confirmed, then sell the N7 to help fund it.