As requested in the readme, I have used flashbench to test the card in the topic. Here are my results, taken by a Debian Wheezy install (Linux omega1 3.2.0-2-amd64 #1 SMP Mon Jun 11 17:24:18 UTC 2012 x86_64 GNU/Linux) on a Transcend 3.0 USB reader running through a USB2 port:
sudo ./flashbench -a /dev/sdm --blocksize=1024
align 4294967296 pre 1.22ms on 1.42ms post 1.21ms diff 197µs align 2147483648 pre 1.21ms on 1.49ms post 1.04ms diff 367µs align 1073741824 pre 1.12ms on 1.41ms post 1.07ms diff 319µs align 536870912 pre 1.19ms on 1.44ms post 1.03ms diff 330µs align 268435456 pre 1.22ms on 1.44ms post 1.17ms diff 243µs align 134217728 pre 1.19ms on 1.46ms post 1.02ms diff 354µs align 67108864 pre 1.18ms on 1.44ms post 1.24ms diff 233µs align 33554432 pre 1.19ms on 1.4ms post 1.23ms diff 187µs align 16777216 pre 1.18ms on 1.43ms post 1.21ms diff 240µs align 8388608 pre 1.14ms on 1.46ms post 1.21ms diff 280µs align 4194304 pre 951µs on 1.12ms post 920µs diff 179µs align 2097152 pre 981µs on 1.07ms post 993µs diff 78.1µs align 1048576 pre 993µs on 1.09ms post 1.01ms diff 93.8µs align 524288 pre 996µs on 1.09ms post 1.01ms diff 86.5µs align 262144 pre 987µs on 1.09ms post 1ms diff 97.6µs align 131072 pre 977µs on 1.09ms post 1ms diff 102µs align 65536 pre 1.05ms on 1.1ms post 982µs diff 89.3µs align 32768 pre 1.03ms on 1.07ms post 1.07ms diff 24.7µs align 16384 pre 1.01ms on 1.08ms post 1.02ms diff 66.6µs align 8192 pre 1ms on 1.08ms post 1.01ms diff 68.3µs align 4096 pre 994µs on 1.07ms post 1.02ms diff 56.4µs align 2048 pre 1.02ms on 1.08ms post 1.02ms diff 58.7µs