I'd love to see this revisited since Bluetooth has taken over the keyboard and mouse world.
I have a Lightspeed mouse as part of my gaming setup and it does feel very responsive, easily good enough for my needs, but I’m not a chart topping FPS player who’d be pushing these devices to their limits.
What's funny is my bluetooth headphones work fine the whole time. They generally only freak out when I'm close to a running microwave.
Turns out that this mouse feels exactly the same as using a wired mouse to me (not gaming). Lightspeed is absolutely not a gimmick!
(I too would like to see tests done with wireless devices.)