I was thinking about this earlier. Speaking as a Toyota fan, here's plenty of Suburbans with the 5.3l Vortec still going strong with over 300k with no major repairs and no one really cares, but when the LC does it, everyone's in awe it made it that far on the original top end. And everyone gushes about how strong the driveline is, but how is it any better than an F250 of the same era with the 7.3 diesel or 7.5 big block, not to mention the 12v Cummins mentioned earlier?
And then whenever the Toyota breaks, it's "just maintenance." When a Chevy, Ford, or Nissan breaks, it because it's a piece of junk.
On the other hand, I really do think the 1fz is a good solid 90s engine which can go the distance if taken care of and kept cool. And the HG thing is overblown IMO; the forums make it seem like a bigger issue than it really is since people generally only post there when they have a problem. In reality the 80 series will put up with neglect better than 99% of its contemporaries. And it does blow, 3500 for a top end rebuild isn't the end of the world. At least it isn't like a 3.slow that blows them every oil change.
I have no reason to doubt the quote
@Arktikos posted. That seems to be the consensus that 300k+ is no mean feat for an 80. Some of them even still go for $15k at that mileage.