To be fair, it's not actually straight UP... it's more of an upward angle. But yes, it really flies out fast and hard, quite noticeably more forcefully than with factory ammo. In my opinion, even factory brass comes out of the port with a bit more UMPH than I would feel is normal. I'm not an AR expert though.
A brass catcher was the first thing I went out and bought after my first trip to the range!
I don't have my load data Excel doc handy, but if memory serves it was in the range of 24.2gr of Varget and a COL of around 2.36". That's memory though, so don't quote me on it. Definitely was well within spec of all the load data I could find.
You can take the Texan out of Texas, but you can't take Texas out of the Texan.