M.2 Pcie Gen 3x4 the fastest ever built?

Maybe I'm missing something, but that seems pretty slow for NVMe x4.

Samsung 970 Pro is much faster than that (3,500/2,700 MB/s) as are the cheaper 970 EVO's, and both the older models (960's).

http://www.samsung.com/semiconductor/minisite/ssd/product/consumer/970pro/