While we can't vouch for the test methods used, their results don't seem too surprising. The Phenom II X6 1090T managed to outperform the comparably priced (if rumors are accurate) Core i7 860 in multi-threaded apps, but it wasn't that impressive in less threaded applications. AMD's six core part was just marginally faster than the latter in Cinebench 11.5 and also marginally slower than a Core i7 960. In 3DMark Vantage we're looking at a CPU score of 16,430, which should put it in a lower performance level compared to both.
The Phenom II X6 1090T also appears to have managed a 4.2GHz overclock with a core voltage of 1.408V, which should give users an extra bit of performance. You can see the complete set of leaked benchmarks here, but as usual you should take them with a grain of salt until the processor is actually out and tested on a wider scale.