Being average is about as much of a non-factor as there can be. It’s really more a male ego thing than anything.
I’m right in the middle of average at the starting of my PE experience, yet every chick I’ve done in the past 8 years has been more than satisfied with my performance. I’m of the mind that even ill-equipped (meaning below average) I’d be a better lover than most endowed or average guys simply because I don’t let my perceived smallness ruin the actual goal.
There’s so much more to sex than size, we’ve just been programmed by the rest of the male culture to believe size is king. It’s more like the difference between a fire engine red sports car and a white sedan that is the same car with different body panels and paint. We’d all think the fire engine red car is better and faster, yet the white car might be more useful and fun. Sex is really about two people enjoying each other rather than stretching her out as big as you can. Admittedly the tighter it is the better you can feel her, but IMO that really only matters on a really loose girl (which is probably more rare than the natural 8” NBPEL penis) or a very substandard girth male.
Technique and foreplay as well as mental stimulation can totally make up for any perceived smallness. So much of sex is mental in both sexes it’s kind of funny.