FWIW: I used to sweat a lot. Today, I still do. But getting in shape helped a lot. When I could run a 9 minute mile for 5 miles, I was shocked when one day I realized that I didn't sweat while doing so. I'm pretty much convinced that sweating a lot is tied to ones level of fitness. For me, it is a fact.
I couldn't dis-agree more...
What I'll say is that I believe that the amount you sweat is based largely on how hydrated you are and how much cooling the body needs to do. Now, that should be pretty simple to check right? Simply be sure to drink a lot of water one day and then do the same workout after drinking less water on a different day. But, of course there are other factors. The more humid it is the less efficient sweating is at cooling the body, etc...
And then we should consider conditioning, working outside, for years on end, in a hot humid climate will likely cause your body to react differently than if you are in a cold dry climate.
Lastly, I think we should take into account how each person deals with temperature. I wouldn't mind going to work (that much) if only people reacted to temperatures in a similar way like I do. If you looked at the ceiling in my office, you'd see that the two different ceiling tiles are covering the place where the heating / cooling vents used to be. I swear, the idiots who play with the thermostat have it set to freeze or boil, it can never be in the middle. So, I covered the vents in my office to reduce the fluctuations and level out the temps a bit.
I'm betting that a few of us know of guys who wear T-Shirts in the Winter months. Those guys who have 'thick blood'. Here's an idea, do a workout one day and then take a baby aspirin (81mg) and do the same workout a different day. You might notice that after taking the aspirin your temperature evens out a bit (you'll likely get better circulation (thinner blood)). Ever notice how some guys are never without a pair of gloves and some guys couldn't care less? I think that is because circulation makes a difference on how our bodies regulate temperature.
I think that smackababy also brings up a good point. Our sweat glands... I don't ever use antiperspirant (I use deodorant), so perhaps my sweat glands are in different condition than a guy who uses chemicals to shut down their sweat glands 5-7 days a week. Even if that isn't a factor, consider that some of us have bigger glands than others, it's just another way that we while all being the same really aren't.
The bottom line for me is that we are all DIFFERENT. Just because a guy sweats more than someone else likely has less to do with his fitness level compared to all of the things I just mentioned. It sounds like typical e-peen to suggest that because a guy sweats more than you claim to, he is in worse shape.
FWIW: I'm a runner. I live in NY and I run outside all year long. Whether it is 4degrees out (Yep, and I STILL sweat a good deal that run) or 90+ out, I'll still be running in it. I think Highland145 brings up a good point. Forgetting that pigs don't actually sweat, which is why they roll around in the mud. Resting Heart Rate can be used to give an idea of ones cardiovascular fitness (how efficiently your body can circulate oxygen around). Perhaps that plays a role in how much we sweat? BTW: Highland145, did you mean that your RHR was 45 right then and there? Or, when you woke up that morning? (I measured mine in between the 50's to 60's while I wrote this post, since I'm dressed to go out for a run and happened to be wearing my BT HRM).