Seems I missed all the fun.
I must have missed the point. From a pure physical sense there are indeed stronger and weaker races, like there are stronger and weaker races in magical proficiency, technological achievements, dexterity and agility, mystic/scientific studies and so on. Not sure if you meant something else.
I also remember the same Tauren shown in the very ending scene of the cinematic inequivocably going for the killing blow against an opponent eating the dirt. It could have been the dwarf but chances are it was the bear.
Heck, even landing on the melee fighting discussion specifically you get several info promoting Tauren as top-notch material when it comes to fighting. Not only they had warriors like Cairne and Huln that were both impressive to say the very least but even cardboard Broxigar praised their value in battle:This means absolutely nothing. Not once have we seen worgen even described as perfect warriors by any Horde race, nor have we seen them be the "better fighters" the only race that the Horde has called perfect warriors are the Night elves.
To have a proud orc almost begrudgingly admitting another race is good as his own about the whole warrior thing is surely no easy feat.Tauren're good fighters. Welcome comrades in any war. Not as good as orcs... but almost.