Ah, but that extra dash adds balance to the acronym! The asymmetrical nature of L-LL or LL-L implies a meaning to that imbalance.

For example, the imaginary company "Happy Toys, Inc." could easily use the domain H-T-I.com, no problem. However, there's no way they would want to use H-TI.com, as the separation of the "H" throws off their name. They could potentially use HT-I.com, however, since the dash could be seen as a replacement for the comma. A domain like H-TI.com would be better suited for a company going by the name of, say, "Hats & Toys, Inc.," where the dash would be a good replacement for the ampersand. But once again, they could also quite easily use "H-T-I" without problem.

My point is that the universal nature of L-L-L will make them ultimately more valuable than the more specific usefulness of the others.

So I completely and respectfully disagree with you. Which isn't to say I don't own a few of them myself.