Sandisk is good :-)

Anyway, the class rating is a very specific measurement of /minimum/ speed in one very specific use, that resembles the kinda of load a card would see in a simple digital/video camera.

Your benchmarks are not measuring class rating, and neither class rating nor benchmarks measure how fast the card would perform for nitdroid or meego..

Actually it's probably impossible to determine the real proper class rating through benchmarks, it requires intimate knowledge of the internal structures and operation of the card in question, something only the manufacturer would know.

My own benchmarks of Sandisk, Kingston and Transcend cards have generally shown the sandisk class 2 as having an overall more consistent performance across a wide range of different type of loads, while class 6 kingston and transcend have beaten sandisk class 2 only in the sequential write/read patterns..