Chase, I think a few things
Chase, I think a few things got lost in translation.
First, everyone is different, so while Maffetone may not have pulled his calculation out of his ass, it's still just an estimate. You can't apply a calculation like that and have it be spot on for children, elderly, couch potatoes and long time athletes alike and unless you're put through a complete battery of testing, you can't KNOW your zones exactly. I agree it's a good place to start, but as Lee has obviously proven, it's not always accurate. 109bpm isn't a "run"...even if you're from Kenya!!
Second, you're not applying the "conversational pace" correctly and it's just a sugesting as another rough estimate tool. If you're not speaking in the same rhythem and breathing patern as you do when you are sitting or walking, that's not a conversational pace. If you have to break up a sentance to breathe, talk faster than normal or can only get out a few words between breathes, that's NOT a conversational pace. I've seen articles in Men's Health, Runner's world and Active.com alluding to a conversational pace, so this isn't something that I just pulled out of my ass. ;o)
Finally, whatever you remember, EVERYONE sweats in Texas, period, end of story!
Besides, I read a study that we actually sweat more and sooner the more fit you are because your body aclimates to the cooling needs. Once you start going, your body knows it's gonna be a while. One of the guys in my running club starts to sweat when he hears the word "run"! My wife doesn't sweat enough in heat and it kills her runs in the summer. She takes water to pout on herself more than to drink.
So in short, we're all different so my suggestions will work or they won't, I make not promises, Maffetone is not a god, Texas rocks and I love to run! Only the last one is fact! ...and the first 2...
-Jonny