Well, AT&T just finished up a call to discuss their earnings announced earlier today. The verdict on 3G performance its most heavily trafficked cities: still needs work! A lot of it. They even gave us a chart to prove it!
Apple executives described the system overload as a "high quality" problem, which from a business perspective may be so, but consumers may categorize it differently. The good news is that there's undeniable improvement over the last several months, particularly in Manhattan. The bad news is that we're still pretty far below AT&T's arbitrary "performance objective," which is still going to be somewhere below perfect.
AT&T expects "significant improvement" going forward, and they're increasing infrastructure spending by $2 billion to back it up. But until one in every fifty 3G calls stops getting blocked or dropped nationwide, I'm going to have to believe it when I see it.