Is that parroted marketing or measurement? 1% better or what? Under High-Speed I/O Performance Apple says 10 Gbps (but of course that's just theoretical), but if you scroll down you can see Apple's table for Promise Pegasus R6 Thunderbolt Performance, and notice that it omits eSata and ExpressCard/34 from comparison and instead chooses the lowly FireWire 800 [A].
MacWorld measured 2GB writes between 161.8 to 215.6 MB/s with a Pegasus R6 Thunderbolt under RAID 0 and between 160.1 to 210.5 MB/s under RAID 5. For 2GB reads, the figures were between 133.5 to 178.6 MB/s under RAID 0 and between 160.1 to 183.5 MB/s under RAID 5 [B].
What would a SATA "6 Gbps" ExpressCard do with a eSATA III drive? I don't know, but hopefully you get the point.
The future looks great though and it is a nice edition to hardware ecology.