Framerate drop on late 13" rMBP 2013

Hey Apple Core,

I purchased a 13" rMBP a couple of days ago. Absolutely loving it so far except for one tiny problem. I've noticed that in Safari while scrolling the frame rate drops (not significantly but not insignificantly either) leading to the dreaded stutter. I was under the impression this had been fixed with the introduction of the Intel Iris graphics with Haswell and was wondering if you've noticed it as well?

Please let me know. Thanks!