The consensus, as far as I can tell, is that his knives are really great hence the high demand for them. Unfortunately the maker could not keep up with the demand and rather than 'closing his books' for a period or using one of the many other well established practices custom knife makers use to balance supply and demand he simply continued to take orders for knives he did not have the capacity to produce. Pepper in some legitimate set backs like materials availability in South Africa and lack of transparency about these delays (i.e. telling people "one more week, one more week" instead of "sorry but it's going to be a couple months longer than I thought") and you've got a pretty decent understanding of the consensus opinion.
It's quite a shame as I really like his designs and his production quality is considered top notch. However I will never buy a knife from him as I doubt the level of support he'd provide for it and there are just so many other makers out there I respect and admire more as people.
Even if he did come to a blade show to sell his wares I'd feel bad about buying a knife from him knowing that he has many customers who've paid him already for products undelivered.
DISCLAIMER: Every opinion expressed above is hearsay based on internet research and having watched the controversy unfold from the start. I've never met the man nor had communication with him of any kind, nor have I held any of his work in real life, nor attempted to place an order with him.