I can dig it Mo. I have one hybrid (Kali Bubba) that's about 50/50 and everything else in my garden is 90-100% sativa. And you're right, extreme sativas are vigorous and a lot of them will give the same amount or better yield from one plant as 3 OG hybrids. How many 10lb+ OG's have you seen? I seen plenty huge sativas that produce 10lb+.
Sativas are great, but unfortunately for now, a lot of people here are wanting Cali strains or at least potent indica strains (probably because we have so many Californians that have moved here). I don't blame them, a lot of great stuff comes out of Cali, but we have arguably the best environment in the world for growing world class sativas (indica strains like it here too, but you can grow those anywhere) and people could be smoking sativa strains that they would probably never get to try outside of the tropics and hence not get to enjoy a good sativa high. I'm not complaining, I just like sativas.
And for the record, I've mostly only smoked sativa strains, but the couple of times I smoked indica dominant strains they DID NOT make my lips go numb, then again I'm not sure I've smoked a sativa strain that did either, ha ha ha. You must have some potent stuff growing in your backyard.