It blows my mind that someone actually took the time to benchmark all these cards:
Sandisk 16 GB Class 2 Read: 7.5 MB/sec Write: 5.5 MB/sec
Samsung 8 GB Class 6 Read: 16.8 MB/sec Write: 7.6 MB/sec
Lexar 32 GB Class 10 Read: 20.3 MB/sec Write: 8.1 MB/sec
And those numbers don't tell the entire story. Apparently the higher classes have a tendency to burn out faster.
Nothing is simple anymore. I should have known that.
That is one of the better ones.