For the times I have flown with TK I had bag delay ONCE when the idiot at CPH who insisted on gate check my carryon and without entering any details and gave me a tag without any number. I was stupid enough not to realize it and when I got to HKG the bag wasn't there and they couldn't trace it because there was no number on it. It showed up 7 days later at HKG totally smashed.
Lesson learned, triple check my gate check tag before letting my carryon goes.
I have had 90 minutes to 25h between flights - and my bags always make it.