I see that he has a New Zealand Elim church background. That Pentecostal denomination is one of the more conservative denominations in the Pentecostal movement. When I get more time, I will view one of his messages on YouTube. On first impression, he seems to be worth listening to.
It may prove better for all of us to begin at the beginning and try to understand tongues as tongues were once understood by the conservative pentecostal churches. You raised Smith Wigglesworth and that of course does set a different light and rather fearful meaning to the gift of tongues and so whilst it is undoubtably the case that tongues has become something very different since the mid 1980's I know that you have written several books on the subject and so you could authenticate a more conservative meaning - not least because you are the oldest member in this thread.
Why can't we do that? Rather than begin in the chaos of today - why don't we speak about the past - pre the neocharismatic movement that gave rise to this present chaos. There are clear reasons why we are in such a fix on this subject and it is only partially grounded in a cessasionist claim by the reformed churches. If we do that we will find that one reality connects both the past and the present. That reality - be it a false or true use of the gift of prophecy - is the connective tissue. By which I mean the things that have been said in prophecy and the rise of an ill effect that is so grave that we have all experienced it by now in fullest measure.
I have friends in New Zealand and I was once under a pastor out of New Zealand - from the conservative pentecostal church. So I have watched this process for the last 38 years. I have no wish to write a book - but I do desire to make sense to others and help believers to address a most important reality that has been corrupted and misshapen to the point of causing extreme harm. So what about it brother?