I have medium sized hands with what I think are fairly short fingers--in any case, I have the G20sf which I believe is very close or identical to the G40 in the grip area. I don't find it 'comfortable', but it's got nothing to do with size and I wouldn't say it was objectionable, either.
I'm not a big Glock fan really, but I own two in 10mm, and what I feel they offer includes:
1) what i believe to be a strong (very strong) barrel, slide and lock up
2) the easiest take-down of any gun I'm familiar with
3) high quality barrel fit and finish
4) 10mm in a double-stack configuration--as God intended
5) an unlimited supply of extremely inexpensive replacement parts and after-market parts if you go for that sort of thing
If you can find a range that rents full size glocks you might want to shoot one--like the big 45, which is rather much a pleasure to shoot IMO.
It may be tough to find a G40 anywhere, although I believe folks are picking them up here and there. You will almost certainly find the "early adopters" over on GlockTalk, and specifically in the "10 Ring" sub-forum, where those who like Glocks and love 10mm congregate.
Personally, even with my 'medium' hands, I believe I would prefer the feel of the fatter Glock to a 1911 in 10mm. I used to absolutely love the 1911, but now find it small and not that great: larger grips I find to be a big benefit for actually using your weak hand and for distributing shock a bit better.
Also, an option for you MAY be to just get a readily-available G20 and drop a longer barrel into it. I don't know if that is compliant with hunting regs, but if so, you would have what I believe would be 'the same thing'--but without the milled-for-optics feature of the G40. A $40 Glock-Burris adaptor solves that problem, I believe. It's an option.
Beware: it is almost certain once you start shooting 10mm you will want to shoot more 10mm.