I did take delivery of the March 2.5x25x52. Yes, the parallax/focus knob is a fast ratio design and it is sensitive in the 20-25x range. Given March chose to calibrate the MP3 reticle on this scope(which is a 2nd focal plane) at 20x, it seems that March intended it's typical high power setting to be 20x. Using a 25x max power, I'd guess that March intended to position the scope against the ATAC-R's top end power. I'd agree that 20-25x is probably unnecessary Having said that I could see where it would generally feel more sensitive when compared to the Nightforce scopes which, to me, have too long of a ratio that can be vague. While probably a matter of personal preference and familiarity, I very much prefer a fast ratio design which for me are much faster to use in the field. This has been one of the attractive features that I really like about my Huskemaw scopes which also have a fast ratio design..
Overall, I am very pleased with this scope! While I haven't yet had a chance to put through all the paces in a long range hunting situations, it sure looks as close to the perfect scope as I think I could get. The optical quality is as good, perhaps better then my ATAC-R. It's a no frills scope with a size and weight that is excellent for a carry LR rifle. I really like the non-obtrusive turrets, zero stop design, and the nicely weighted MP3 reticle,. The fit, finish, and workmanship is what exactly what one would expect from a high end scope.