I can't say i find this odd. Lots of golfer would not let a stranger hit their driver. As it was 910 it was likely pretty new, and as you list yourself an 18 capper I am sure you would leave some doubt in the guys mind.
To be honest I would never ask a stranger to hit his club, if asked by a stranger it would be 50/50 if I would say yes, depending on lots of factors. As for buddies, I think nothing of it, even if they do suck.
I think that maybe I should make it clear that I don't normally ask to hit other golfer's clubs... It's happened in the past, but only once with somebody I didn't know, and he was cool with it, normally it's with buddies. The only reason I found it a bit odd was due to the conversation we had been having prior to that about equipment and how he was "surprised" that I didn't have one. No big deal. Just wanted to see others feeling on this.
Fine by me. You have a nice day too.