I have several LPs which I recorded (the first being Canto General, music of Mikas Theodorakis). For that recording we got the biggest bass drum in the state, which was a good six feet across. I have the master tapes and I know how this recording is supposed to sound. The LP was cut without any processing whatsoever other than RIAA pre-emphasis.
This LP does quite well as a test record for me as it has very wide dynamic range and very deep bass. Most arms can't play it right; the Triplanar is one of the very few that can. It also easily tracks the Church Windows LP which has groove modulation well in excess of 60 microns.
As others have mentioned, the arm tracks everything you throw at it. In fact this arm taught me that the ability of the arm to track the cartridge correctly is far more important than the choice of cartridge. It is the most adjustable arm in the world and has the lowest friction bearings of any arm made.
Regarding not believing you:
Being quite familiar with Occam's Razor, right now its suggesting to me that there is a simple explanation here: despite claims of many arms and cartridges, you may not know how to set up a tone arm and/or you don't have and never had a Triplanar.