Body size is smaller on EPM1 and GF3 compared to the prev m4/3 models, but size of lens still larger than what the Q has.
The Olympus kit zoom is not too badly sized, but still it won't be pocketable unless its cargo pants or Bermudas.
If you want a size and performance level between DSLR and compacts, then m4/3 is not a bad option.
If you want something with size and performance level between m4/3 and pns, then its the Q.
The Q seems to have a better traditional dial and button interface. The EPM1 and GF3 are rather 'dumbed down' from prev models, relying more on the touch screen which is not tactile.
Don't forget that the Q prime lens 01 will be smaller and faster compared to the Oly 17/2.8 shown in your linked photo.
The Q will be more 'unique' since your wife will be the fewer ppl using this, compared to the droves of ppl using m4/3.
Playing around with my m4/3 pancake primes, I've noticed that the size of the lenses come at the cost of boundary sharpness, and distortion control (supposed to be corrected in software in-camera, but still very noticable. Not that they matter in all photos though, but if you are a stickler for such details, then do take note. In fact I find the 14/2.5 and 20/1.7 to be really nice.
Can't comment on lenses on the Q yet.
IMO, options abound in this price range of $600 to $1100.
Frankly, I'm equally confused as you on the options avaliable.
But I'm sure I'd like any of them when I get them.