I agree with the sentence. It's impossible to realisticly quantity what makes one bike better for a particular rider over another. Weight is a nice, simple easy-to-measure number. Frame & component cost is another. I have a strong feeling most of us (especially me) couldn't tell a 20 pound bike from a 19 pound one from the saddle. Or top of the line from mid range componentry for that matter.
I've been buying & selling a lot of bikes recently. It's my policy to test ride for a few miles, usually about 10. A nice Bridgestone MB-6 was a favorite. Fast, responsive, effortless to cruise on. Good climber. It wasn't the weight, but the street tires & geometry that made it feel better than other similar bikes in my rotating stable.
Just ride the damn bike you got.