Marco, re: "the Intel DC S3700 offers flat, consistent performance across the board, regardless of the queue depth or access pattern".
This is a clear sign of a design defect. When performance does not improve as a function of queue depth, it means that the drive is essentially broken, incapable of parallelization of queued I/O request.
That Intel marketeers can turn this around into some bizarre kind of "advantage" is amusing, at best.
From what I can see, these new "Data Center" class SSDs from Intel are optimized only to increase Intel's profit margins.
Apparently they do this by eliminating the licensing costs of the LSI Sandforce controller, which outperforms the Intel silicon by a factor of 2x-3x.