No, it's not, however, the ASM1061 for the additional internal SATA 6Gb/s ports is under the PCH cooler, and was not pictured in my preview. THe one pictured in the preview is just below the rear I/O, near the board's left edge.
It actually seems there are two ASM1061 controllers..the one pictured above, is for the rear I/O eSATA. USB 3.0 on the rear I/O is provided by the Z77 PCH. The mSATA is controlled by Z77 PCH, and the secondary internal SATA 6 Gb/s ports are powered by yet another ASM1061 right near the SATA ports. One of the Z77 SATA ports is unused.
All thanks to a conveniently placed speck of dust.
I'll have everything proper on the full review, after IVB launch.