I don't know if it's helpful to add any more here, or if it will just muddy the waters, so apologies if it does!
@redinthenose while I agree with some of what you said there's quite a lot I would dispute.
It's such a shame that a description of autistic children's language has become something people declare a "belief" in (or not). I've been practising for over 20 years and am a pretty sceptical person - if anything I overthink. In my work I regularly ask myself "what if I'm wrong?" (about a diagnosis, therapy approach, etc) and always come back to "first do no harm".
GLP is just a descriptive label, not a diagnosis. NLA is a framework, not a package or programme. Unfortunately a lot of the content on social media about GLP is over-simplified, and maybe gives the impression its all about scripting and phrases. I'm not sure why anyone would describe NLA as intensive.
I maybe shouldn't have posted this evening as I doubt I've made much sense (post-migraine fuzzy head). But I just wanted to pop back up and say that just because a therapist finds NLA a valuable therapy framework that doesn't make them gullible, stupid, inexperienced, money-grabbing or a sheep (all things I've seen here and in other places online)
GLP as a concept has resonated with many parents because it fits with what they see in their child, and values their child's natural communication. If everyone starts jumping in with NLA for every child they meet, that could be harmful, but it would also risk harm if SLTs disregard it out of hand without a good understanding of it.