High end speakers without bi-wiring?


Recently, I've read quite a few posts that disclaim the benefit of bi-wiring. The claim is that for bi-wire capable speakers, there is no noticeable difference between bi-wired and single-wired connection, assuming good quality jumper cabbles are used for single-wired configuration.
Then, is there a move from high end speaker manufacturers to forget about the bi-wiring option and just provide single wire for their high-end speakers?
(Well, bi-amping is another issue, but let's not consider bi-amping.)
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Wilson and some Sonus Faber are single wired, I think the higher end Focal also; my Mini Utopia was single wired. I am sure there are others. Martin Colloms, among others, has suggested that single wireing is better in most cases.
Bi-wiring is a great tunning tool if your going to use different types of cable on each binding post.
You can tune the tweeter just to your liking and also the mids with different type wire going to each.
It depends on the speaker. Dunlavys sound better with single wire. Vandersteens sound better biwired. You can't say one is better than the other for all speakers.