autos are always better than manual for daily driver (esp when there's a lot of traffic!)
you should search on this topic as many have described pros and cons of either transmission. i do find it odd that people are quoting faster time for the automatic given that it's not a dual clutch system like DSG or DCT. perhaps c&d simply didn't try hard enough in their first drive with the 370Z. however, automatic will consistently outperform manual for most drivers who aren't super skilled at shifting (like me)