A minor urk is when you close Safari and then re-open it later, it seems to reposition itself at the top left. Not always, but sometimes.
I have a 2011 MacBook Pro - Safari was quick before Mountain Lion but I've noticed a real speed improvement since the upgrade.
I agree with original poster...Safari is slower. Why does each page have to have a loader bar across the top of panel? It is definitely slower on my 2011 iMac, i7, 8GB machine. It is annoying
I have put it on my new MBP retina 2.7/16gb also my MPP from last year,
3 fully loaded desktops and 1 macbook air it seems slow on all of them.
I tested my internet connection and the download speed is 64Mb/s
Upgarded all my macs last night and it seems Safari is much slower
to load pages than before? Compared to canary chrome it seems at least 3x slower?