In addition to the above, the Pascal "P1" (as opposed to X1) Tegra has two reported performance numbers. One is 1.5TFLOPS, but that's at 16-bit precision (to bastardize things, think of it as operations that a SNES CPU could do, but just billions more of those in a single second, but those operations are useless for 3D games) and 0.75TFLOPS in 32-bit precision.
A XB1 has a reported capacity of about 1.4 TFLOPS at 32-bit for comparison, and PS4 1.8, or 1.9, can't remember exactly, and those are nothing compared to the 4+ TFLOPS of the PS4 Pro, and the even higher number of the Scorpio coming next, but for the purpose of getting ports of games from the other platforms, since all games going forward need to run on the original XB1 and PS4, those are the ones that the Switch would have to be comparable to, at the very least so as to make porting not quite as difficult and thus cheaper for third parties.
But the report here suggest 1TFLOPS. either the guy is averaging the 16 and 32-bit numbers given for the Pascal P1 Tegra, which you simply can't do, sorry to say, it doesn't work like that :P, or he has more info that we don't have about perhaps a custom version of the chip made specifically for the Switch capable of performing more 32-bit operations per second than the base P1, which as I was saying just earlier elsewhere, might explain the need for a fan in the console, since normally those chips could be cooled passively, but in this case, maybe there's some overclocking involved, at least when the system would be docked.