I got mine last week, with the following specs:
OcUK Limited Edition P170EM 17.3" LED Full HD Intel Processor, 1600MHz DDR3, SSD + HDD, ATI HD 7970M 2GB GDDR5 Graphics Card - Windows - Black
Intel Core i7-3630QM 2.40GHz (Ivybridge) Mobile Processor - OEM (SR0UX)
Corsair Vengeance SODIMM 16GB (2x8GB) DDR3 PC3-12800C10 1600MHz SODIMM Kit (CMSX16GX3M2A1600C10)
OCZ Vertex 4 128GB 2.5" SATA 6Gb/s Solid State Hard Drive (VTX4-25SAT3-128G)
Samsung SpinPoint M8 1TB 5400RPM SATA-II 8MB Cache - OEM (HN-M101MBB)
Microsoft Windows 7 Home Premium SP1 License 32/64-Bit
I haven't tried any real demanding games yet, but WoW runs as smooth as anything. I just had to set the switchboard graphics to choose high performance graphics (i.e. the 7970M), as initially it chose the Intel graphics for some reason.
With the SSD, cpu and memory specs, everything is also loading really fast and multitasking doesn't affect performance.
Personally, I'm very satisfied with the performance so far, but someone into professional gaming might have more relevant experience to share.