Sounds reasonable to me. I've noticed that sometimes, when I get a comment about the tremendous reach my camera must have, and I hand it over to them to look for themselves, it gets completely ruined. 
It goes like this:
First comment: Gosh, is that heavy. How can you carry it around? (If it's indoors, we're now typically talking about the EOS 40D, EF-S 17-55 f/2.8, grip BG-E2N with two BP-511A and the Speedlite 580 EX II, a 2.5 kg piece.)
Second comment: How do you turn on the display? (As I don't go into the manual focusing live view procedure, I urge them to look through the viewfinder and press the shutter button half way.)
Third comment: Where is the zoom button? (I tell them to turn the ring on the lens, which in turn requires the basic lesson of how to hold an SLR properly).
Fourth comment: There's something wrong, the zoom seems blocked. (When they see the impact of a 55 mm focal length of this camera).
As someone wrote above, there's no need to be rude just because someone doesn't know the same thing as you do. So if they seem genuinly interested, I may go through the basic differences in priorities you have to decide upon, when you purchase a DSLR camera and equipment versus carry a P&S in your pocket. If you do care about going through that, you'll actually find a few who are much more interested than they even knew themselves.
I have no problems with people trying to hold my camera like they do with their cellular phone. They just don't know better.
On the ohter hand, I don't bother very long with people who still try to do that, after I've shown them how to hold an SLR, where to look and what to turn. If they don't want to learn, then don't waste my time.