I always love these arguments for the entertainment factor

I love my Leicas but I am always the first to say that GEAR MEANS NOTHING AND IT IS NOTHING BUT A CHOICE. It is your choice to shoot the cameras and lenses you love based on a multitude of factors, ie: budget, speed, quality, lenses, durability, weight, taste, etc. I have seen absolutely shit images taken with $20K worth of gear (digital and analog) and stunning ones taken with an Holga or a Contax T2...or an iPhone!. Leica aficionados seem to be always very passionate people but, I must say, for the most part, very few can back it up with decent images. They get too wrapped up in the "Rangefinder Lifestyle", the lenses, the talk, and forget that, without paying attention to one's surroundings, lighting, geometry, a moment, all we have is a crappy photograph taken with an expensive piece of gear.
I love my Ms for most everything for a variety of reasons but I could do the same with my FM3A, which I do use as well. I bet that very few, if any, would be able to tell the differences in print, or on a screen, unless doing an Erwin Puts test, charts, you name it. Again, it's simply my choice to shoot most of my work with a Leica, with some of the quirkiness and drawbacks. To each his own, as always.
So, yes, manual focus is slower than AF (depends on who you talk to) and some Nikon lenses are better than Leica or the other way around. At the end of the day, do your images reflect the effort you devote to choosing a piece of gear?