I'll give you a challenge then, find a squier strat that isn't modified in any way and a fender strat from 1963 and see if you can hear a difference!
I suppose it depends on whether or not the player is trying to disguise what the guitar is. if the player accentuates the differences, you could probably/possibly hear the differences.
(a) Double blind just means what it is is recorded somewhere, but the tester and subject both dont know what is what to avoid any possibility of bias influence. Easy with sound files, as a PC is 'blind' already; it cant offer any kind of unintentional hints. I suppose with guitars they could just be handed to a blindfolded person silently. Wouldnt be very amusing to watch though.
(b) I agree on the playability and better performance when not fighting the guitar, but that doesnt take a hell of a lot of money. You can get very cheap guitars that are very playable, and otherwise its just a matter of how much setting up you want to do. Also, thats very variable person to person. I'll play better on the cheapest RG than the most expensive LP! (assuming both are well set up).
Just to be clear, when I've been talking about 'feel' before, I've assumed a basically decently put together guitar thats set up well. I think everyone has, but I thought I'd better make that explicit.
(a) I know what double blind is. :) I'm saying it's virtually impossible when trying (not listening to a guitar, I mean actually playing it) a guitar, because if you know anything about guitars, there will be clues even if you're blindfolded.
Compare a gibson versus an epiphone? Most guitar players will be able to feel the nitro finish, and smell the vanilla (?) that gibson sprays on its guitars. Ditto expensive fenders versus squiers (apart from the vanilla thing). Different hardware fitted to different guitars will feel different, as will different neck profiles, fret sizes, etc.
It can be done with listening, as you said, but I'm not convinced how much use that is (especially if the player is being a smart alec and trying to disguise what the instrument is; conversely, someone accentuating the differences between the two instruments could also be accused of not playing fair). Thinking back to music class at school, an awful lot of people couldn't tell a flute from a trumpet, that doesn't mean they sound the same, lol. Not to mention, the recording techniques etc. will affect the final sound of the thing as well (as you know more than I do :lol: ).
(b) to a certain extent, but then you're into personal preference regarding neck profiles etc.
I'd say more expensive guitars, generally (and excluding chancers like devries), play better than cheaper ones.