Yes, SSD's (and SSD's in RAID configurations) are indeed still faster for sequential access than they are for random access (significantly, in the case of writes, slightly in the case of reads). Spinning disks are significantly faster in sequential access for both writes and reads.

Note that I've provided some SSD performance results in the

RAID and Its impact on your SQL performance

thread.

Testing techniques and how to load the output into SQL Server comes from the FusionIO thread.