A lie huh? It can only be a lie if I know it to be wrong. I don't. Please accuse with more caution thank you.
New Zealand GIS expert (and pilot) Andrew McGregor has used a combination of sources including SRTM and LINZ to create an X-Plane mesh that is, as far as I can tell, the equal of your 20m mesh (I'm chatting on MSN with him as I write this - and getting the lowdown). By using some cunning Andrew managed to avoid 'commercial' i.e. need to pay for sources, so X-Plane users can have this for free! As well, it comes with tree data that is accurate down to hedge rows, so you get accurately placed forests, trees and shrubs, from forests to windbreaks.
Consequently I do have to apologise. Andrew's mesh is only better than two old lower-quality mesh options that used to be available. However as it does claim a 20m mesh, it apparently is the equal of your best one. My apologies for the mistake, but please think before calling someone a lier.
For the record, X-Plane's default scenery is vastly more accurate than MSFS/FXS's. It would need to be - it comes on 7 double layered DVDs!
So simmers, if you want to fly in NZ with a mesh that's pretty much as good as Christian Stock's you can have one for free with X-Plane. Having said this, X-Plane's land-use data is nowhere
near as good as Christian's. Andrew is working on this, but still has a way to go.
Main thread:
http://forums.x-plane.org/index.php?showtopic=38099&hl=View of Mt CookView of Wellingtonps. you might want to replace the link to AVSIM for the scenery review, now that the site is gone.