I was at Micro Center today and decided to pick up a couple SD cards to use for my Raspberry Pi (when and if I ever manage to get one). They've always carried house brand/bulk USB flash drives and SD cards for pretty cheap. I've bought a bunch of the them over the years and, while they work fine, they always seemed pretty slow. I was thinking I would get a name-brand high speed SD card for the RPi but then I noticed they carry an "Extreme Speed" house model so I decided to check one out.
kevin@minteee ~ $ sudo hdparm -t /dev/sda /dev/sda: Timing buffered disk reads: 88 MB in 3.00 seconds = 29.31 MB/sec kevin@minteee ~ $ sudo hdparm -t /dev/sdb /dev/sdb: Timing buffered disk reads: 46 MB in 3.11 seconds = 14.78 MB/sec
/dev/sda is the internal SSD on my EeePC 701 and /dev/sdb is the 8GB Micro Center card I bought. It seems to be about half the speed of the SSD on reads which seems like it's pretty good. I don't really have anything to compare it to at the moment though.