As an indication of trends.
CF 600X = 90 MB/s.

        http://www.dpreview.com/news/0910/09102004lexar600xcf.asp

90 MB/second is "quite good".
This could be done by interleaving a number of IC's internally but is
nonetheless very impressive.

Even at this speed with no other bottlenecks it would take 6 minutes
to download a 32 GB card.

I tend to use 8GB 133X Transcend cards.
Apart from card swapping and opening time this is not a lot slower -
and is far less expensive per byte.
(About 10% of the cost based on the stated prices for an 8GB card).


 Russell

_____________

"Lexar has announced the Professional 600x (90MB/s) UDMA CompactFlash
memory card in 32GB, 16GB and 8GB capacities. The fastest CF card from
Lexar to date, it is compatible with the new generation of
UDMA-enabled DSLR's. The company has also introduced a new
Professional ExpressCard CompactFlash reader, supporting read/write
speeds of up to 133MB/s (886x). In addition, Lexar has also upgraded
it's Image Rescue image recovery software to version 4."
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