Whilst the overall suite is much better than the 2008 version I have to say the performance of Excel on the Mac is just extremely poor when copying chunks of rows to another sheet it's just painful.
Only talking maybe 10,000 rows and it borks - having used Excel on Windows for many years, including the latest versions capable of handling million row spreadsheets, the performance overall of the Mac version is crap.
Very near to being a great suite but I wonder if they have the inclination to resolve and improve.....