With the c't H2testw the card reaches in my Kingston FCR-HS3 card reader 42.0 MB / s write and 88.7 MB / s when reading. I think that, especially considering the fair price for a very, very decent result. How does it slows down the card anyway. My Lexar 1000x is writing, although one and a half times, and when reading still one-sixth more quickly, but it will cost more than two and half times the SanDisk.
This gives me the SanDisk Extreme CompactFlash 64GB a quick card with a very good price / performance ratio.