Yeah, but I don't think anyone who's played TT regularly would call this "intermediate". It's like calling someone who managed to code fizzbuzz an intermediate programmer.
To be honest this feels a bit pedantic to me. "Intermediate" is a pretty vague word and unless there's some official rankings termed "intermediate" I'm unaware of, the authors of this paper are fine to apply it as they see fit.
There are a significant number of players worse than the robot, and a significant number of players better. That's fact, and that's all "intermediate" means.
Left-handed, one one leg, one eye closed and a mobile phone instead of a racket. Reminds me of a clip of Truls Moregardh playing a reporter with a phone: https://www.youtube.com/watch?v=3EJaT1b8QmA