In response to Spunky_Girl
First result is Wikipedia page which has that information.

"SSDs based on volatile memory such as DRAM are characterized by ultrafast data access, generally less than 10 microseconds"

"About 0.1 ms - many times faster than HDDs because data is accessed directly from the flash memory"

"In November 2010, Fusion-io released its highest performing SSD drive named ioDrive Octal utilising PCI-Express x16 Gen 2.0 interface with storage space of 5.12TB, read speed of 6.0GB/s, write speed of 4.4GB/s and a low latency of 30 microseconds. It has 1.19M Read 512 byte IOPS and 1.18M Write 512 byte IOPS"
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