This review is unbelievable, I have a GS, bought believing htey are reliable only to discover the Final Drives are prone to failing, often below 10k miles, and many owners who have clocked 50k have had 3 or even 4 final drive failures. You also need to carry a spare EWS ring (immobiliser) and Fuel Pump Controller around as these are extremely prone to failure. Just got back from a 3,000 mile trip on mine and during that trip the bike blew both fork seals, developed a clutch fault and warped both front discs - and on the GS forums it is almost daily event that someones bike gets towed away with either a final drive or FPC failure. Certainly not reliable!
As to the Tenere being Oh so huge, well I parked my GS next to a dealers demo Tenere and the GS dwarfed it, I only have the standard GS not the much larger Adventure and it looked way taller, way wider and probably a bit longer, sitting on the Yamaha it felt much smaller, the ground was much closer and the bike much narrower, anyone saying this is huge after a GS is either a complete moron, or on BMW's payroll, and when riding the Yamaha it feels no heavier than the GS and is less top heavy, it certainly manouvres at low speed easier than my tall and topply GS.
In the UK BMW win every bike test shootout, on the Advanture bikes and sportsbikes, but the magazines always have huge double page BMW adverts, the bikes are laways described as reliable, despite what many owners will tell you, my main reason for wanting the Yamaha is I just do not trust my GS to get me from A-B, and when it does go wrong the service and parts costs are almost double that of Yamaha - luckily my fork seals were done under warranty as they are a £400 job at a franchised BMW dealer!!!