Yeah. Except that doesn't actually happen. I thought it did too at first, but I've been running 1000 DPI on my G5 instead of 2000 and it's honestly no different.
Source for that?
It's pure logic: less DPI = less precision => less accuracy (however minimal) of mouse- to onscreen-movement translation.
Even when the hardware switching from 2000 to 1000dpi is perfect and completely lossless, it still results in a less accurate mouse.
I'm not saying it makes a huge difference, and I probably wouldn't be able to tell if I had to do a double blind test, but it's just one of those things that you 'feel'. Same reason why people use different brands of guitar strings when their specs, sound and quality are exactly the same.
In short: I find I play better if I use 2000dpi. Whether that is because of actual higher hardware performance or placebo, I don't really care.
I am thinking of dumping the G5 altogether though. I absolutely love the feel of the mouse, but having switched from a mid-high sens player to someone who will use their entire monstermat surface for aiming, the G5 doesn't cut it anymore. Most notably it's max acceleration and speed are annoying me. Now that I'm becoming faster at playing low-sens and have got those 'snap' shots down, I've had the G5 crap out on me and just not register my input at all lots of times. Annoying as hell.
However, if I still played high-sens I would go out right now and buy 10 more of these mice, in case they take them out of production anytime soon
I'm thinking of getting one of those sweet deathadders, but I haven't really got the feel for their design and ergonomics down yet...