I would suspect (since I can't prove it) that there is some level of bias to this or any other report (fanboy, pressure, bribe?, etc) but as a BMW owner, we can compare what have by driving (test, borrow, previously owned) other cars in the segment.
If you can honestly collaborate or dispute what was written about your car, that's what counts.
My 1st BMW-bought fr inbound inventory: Munich 2013 F30 335i, RWD, Alpine White, Black Leather, M-Sport Line/Pkg, Dynamic Handling Pkg (Adaptive M Susp, Var Sport Steering), Prem Pkg, Tech Pkg, 403M (Potenza S001 RFT 225/40, 255/35 R19), Sport auto w/paddle shifters, Heated front seats, Harman Kardon, Aluminum Hex Trim matte EB accent, Anthracite headliner
Std: Xenon Adaptive Headlights, Sunroof, Alarm
Mods: Tint, DIY lower intake grill guard, ASS recoded
Hergestellt in Deutschland