The handset is powered by a 1GHz dual-core NVIDIA Tegra 2 chipset, which promises way faster performance than single core handsets, especially visible while loading pages and browsing (check our comparison here). The T-Mobile G2x is sporting NVIDIA's Tegra Zone app, which is a hub for news, apps and games that are tailored to the mobile Tegra chipset, so it is important to measure the dual-core might.
We got 2100+, which is very good, but on the low end of what we've been achieving on the G2x's inspiration - the LG Optimus 2X, which is basically the same phone. With the Optimus 2X we consistently scored around 2500, and even managed to eke out 2777 once. Bear in mind that the T-Mobile G2x we tested is probably not a finalized unit, and, what's more, we ran the test just once. Not to mention Quadrant should be optimized further to measure multicore chipsets performance.
So far it seems that the dual-core chipsets can be arranged in this way - OMAP4>Tegra 2>Snapdragon in terms of performance, at least according to the benchmarks, but we will have to wait until all units hit retail to make some more in-depth tests.