So, I don't mean to beat a dead horse, but with with the retina mbp refresh I have been considering getting the retina 13". Coming from an early 2010 15" mbp (dual core i7), portability is a big issue form me. I'm sick of lugging around a lare/heavy computer and look forward to having something a bit more manageable. However, with the discussion about a possible Haswell upgrade in Q3 or Q4 2013, it begs the question, are the 13" Ivy Bridge models sufficient powerful for a smooth experience? I want to be able to use it on the highest or second highest scaling option, and my understanding is that those options impact performance. Also, there's been a bit of back and forth on whether the machine suffers from scroll lag or not. Is it possible to run it at 1680*1050 scaling without scroll lag in safari (or webkit) and native apps? I don't want to end up with a computer that feels half baked, but if the Ivy Bridge models are sufficient enough than I might just bite the bullet and buy now instead of waiting for an August/September Haswell refresh.