He's only played 287 mins (3 starts 4 subs) so that's virtually an assist (officially it is 1 because 1 was deflected and not sure why the other doesn't count in the official stats!) per 90 mins !
I think it is the eye test though. His pace is incredible, it frightens defenders and turns defence into attack instantly (a la prime Salah). He's never going to be Mo of course but the team looks far more balanced with him out there. He's pretty good on the ball too. His fragility is an issue though if he's going to keep missing games.
Oh and he cost €40m (£35m) so probably about right in this market. Not sure how much better we could have got for that.