My only comment is that the forum you link to appears to be run by BMS. Terry and two employees are the admins. The forum was created after there were disputes on several pre-existing public forums, there were some individuals banned, and then that forum was created.

That isn't all a bad thing, X5World (now Xoutpost) was first populated by a group of refugees from another forum in 2005. N54tech is a little different IMO though. E90post is one source if you want to see the history of the disputed claims by various tuners.

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2007 X3 3.0si, 6 MT, Premium, White

Retired:
2008 535i, 6 MT, M Sport, Premium, Space Grey
2003 X5 3.0 Steptronic, Premium, Titanium Silver
2002 325xi 5 MT, Steel Grey
2004 Z4 3.0 Premium, Sport, SMG, Maldives Blue