Well in fairness to the Leica rangefinders and others for that matter, we need remember their designed for hunting primarily.
Shooting at 2000 yd targets falls way beyond the realm of practical long range hunting.
Thats not saying its not possible, just that its highly unlikly to hit and kill anything at those type distances.
But Andrew, if you wanna have a rangefinder shootout count me in and lets not stop at a mere 2300. lol