13" 2015 rMBP here, Core i7, 16GB ram, 512GB SSD. Cost me about $3k CAD. Ive notice scrolling pictures is choppy, resizing windows is embarrassingly slow, and scrolling web pages is laggy. Was like this right after initial setup. Oh..and finder flickers.. My 13" Air isnt like this at all except the pictures thing...so is this something that will get fixed or is it just that the retina resolution will lag it too hard even on the iris 6100? This is kinda bad for the price..