I don't think it's a regional prejudice thing, it's an important consideration in gun selection because I do recognize people do things differently. Manitoba grouse hunting, for example, covers open pasture to thick bush and logging trails, stubble fields to tundra, evergreens to bare deciduous trees, warm Sept days to cold and snowy. So we don't have just one style of grouse hunting.
Yeah, i've hunted grouse there. Or chickens i guess you'd call 'em. Only a few times with my uncle (grandad would have little to do with it, he said he'd hunt 'em more if they were ducks

the man was a driven duck hunter). Whole different ball of wax than out here, that's for sure.
Hey, if you want to differentiate between hunting models then by all means that is an entirely fair thing to do. I mean without a doubt we do that with other game: "are you treestand hunting, spot and stalk hunting, road hunting, glassing, etc etc". And if i've 'read in' more than you meant than so be it, hey it's the net it happens.
However i'd propose to you that by differentiating between 'hunting' and 'shooting', you present the idea that folks who shoot them with a .22 aren't actually hunting grouse. And that's not in keeping with simply differentiating between methods, as it suggests those who use one tool are hunters while the others are not.
As a personal suggestion (take it as you will, milage may vary, check local dealers for details) maybe you should ask if people intend to wingshoot or groundshoot, or the like.
It's fine to suggest that one method is your favourate, or that you feel one method is more challenging or even 'sporting' in your mind - heck i got no problem saying 'if baiting were legal here, i'd still perfer to hunt bear without bait'. But we've seen SO many fights between bowhunters vs rifle, treestand vs ground, road vs stillhunting, bait vs spot and stalk, etc etc etc and everyone feels their method is morally superior to others (We even had one guy here claim that only falconers are 'real' hunters - everyone else is not.

yeash!). We have to learn to respect ALL methods of hunting - or the anti's peck away at whoever's least popular. (hey don't get me wrong, i struggle with it sometimes too)
Anyway - like i say take it for what it is. I'd just rather see people avoid suggesting one method is 'better' than another, rather than just prefering one method over another.