It's better than a typical veggie burger for sure but will definitely not choose it over meat.
Wait, what?
They do get flame grilled initially, after being pulled from the freezer, but then they sit in a heated drawer for an amount of time. The only reheating they get is a quick microwaving for maybe 5-10 seconds, and then they're off on their way. (This is all unless you ask for it fresh, in which case you'll wait for 2-3 minutes while you get a fresh patty.)
In addition, the people working in the kitchen are supposed to toss any extra patties out after x hours, provided they don't just press the ignore button when the timer goes off and do nothing, which is what I saw 99% of the time when I did this job like, 15 years ago.
So if you come at an odd hour, you may be getting a particularly old patty. Granted, things may have changed in a decade and a half and I worked in a very low profit store in a rural area, so my experience may be much different.