Got mine three days ago and I confirm that the rMBP 13 Late 2013 does have noticeable and annoying lag issues.
Not to mention when I turned it on first time and the first setup window popped up I coudn't use the trackpad and keyboard because it did not work! Shame on you Apple. Serioiusly. Anyway turning it off and on fixed the problem. BUT I strongly believe that a $1,500 laptop should not behave like this.
I didn't buy the previous model but waited for this year just because of the notorius lag issue.
At their last event they hyped up the new models and I believed that the problem was totally gone. But now it's clear it is not.
Anyway, I really hope that all the screen lags are just software issues not hardware. Otherwise it's a BIG FAIL and Apple should take responsoblity to let people return their sh*tty rMBP Late 2013 and get refund regarding whatever return policy they have.
What do they think their customers are?
We do NOT buy the glowing Apple logo on the lid we buy technologies that work.
If they do not work properly and flawlessly what is the point in them?
Do they think they can feed us with sh*t and tell us it's cool because it's from Apple. No way.
I will deinifetly think twice before throwing money on any Apple products EVER again.
I will never advise Apple products to anybody anymore.
I've been a loyal customer for years but seriously Apple (the most expensive company in the world) cannot treat their customers like this and sell them sh*t.
I really wish I had read this thread before throwing $1,500 on a supposedly "best" laptop.