That's even much higher than the class 10 transfer rate though. Class 10 guarantess a minimum rate of 10MB/s but never much higher than that. The fact that a picture exists of a class 6 card that has such a rate written on it in itself is weird. I'll bet that asterisk next to it means " *Under ideal circumstances ", such as a 100% non-fragmented card .
Anyway... I always try to get class 10 cards as well when I can. I need a new SDHC microSD card for my phone personally, I'm just not decided yet between a 8 or 16 GB.