Maybe it's just me getting old but... as a scientist I love technical reviews however I care more and more about feeling that real world performance. If a tire feel fast, it's what I will go for. My favorite road bike is my 12yo CAAD10 because I just love how it feels and the geo is perfect for me. This kind of thinking has been mostly phased out of the reviews and the design lately while the engineering has been optimized to a point almost all new bikes (and also true with cars IMO) feels more or less the same. Nowadays, I value character over numbers.

And if you live in a mountainous area, bike weight do make a big difference, up to a point. :)

Yeah. Between two brands of racing tyre the difference may be small but between racing tyres and some mountain bike tyres there's a very noticeable difference.