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jps4jeep, thanks for clarifying info with "I have heard" and "this is second hand info". While you're asking the reader to put less weight into what you are saying, you are only muddying the water by passing on what could likely be mis-information.
My experience with all three of those tires is that they all wear poorly on the road. If you want to get your money's worth out of an MT and it last on the highway, get a BFG MT. It'll last 50K plus, and will do halfway decent offroad. It' has a harder rubber compound than the three tires you mentioned, resulting in more miles. I won't recommend anything for offroad, as you only stressed mileage.
A benefit of belonging to a decent size Jeep club, I see what equipment works for others and what doesn't, especially tires. I'm also nosy around the local shops, and watch what they work on and what fails. I've seen many MT/R's and Yoko's wear out before 20K, enough I'd never own a set. Even if they last 25K, you may or may not be getting your money's worth.
There are about a half a dozen sets of TSL Radials being used in the club, but none long enough to judge mileage. I run a set myself. What I have seen is that they balance fairly well and do good on the road, in all types of weather, much different than bias-ply Swampers that have the poor reputation mentioned above.
I've always considered the MT/R's as over-rated and over-priced, they were a fad tire that was introduced to the wheelin population when the market was prime for a new MT tire. There hadn't been a new MT for quite some time when the MT/R was introduced, hence it's popularity.[addsig]