I use TAG one. Super fast mouse
Best mouse for Bullet and Hyper Bullet chess?

Don't all mouse's send the signal electronically? Same signal speed. Just that some are more responsive, recognize hand movements to a better degree, track more precisely, respond to clicking with greater ease and control.
Also, how it feels to the hand, size and shape. Is there a study of top of the line gaming mouse's? A comparison rating? In the end, doesn't it come down to personal touch and feel?

Billed as the “world’s fastest” gaming mouse, the new Logitech G402 Hyperion Fury Gaming Mouse boasts an IPS (inches per second) of 500. The G402 inherits a lot of aesthetics and ergonomics from the Logitech G502 Proteus Core we recently wrote about, though compared to the Proteus and wireless G602 cousin, the G402 looks downright stealth.

Constant communication
With a 1 millisecond report rate, you can be confident that your movement will be communicated via USB at fast speeds without troublesome lag.
All the "best" I saw were with cable.

Keep In mind, like anything else, Top 5 often means best selling, which means "the cheapest" . You can spend up to $400 for a mouse with all the bells and whistles. The G402 can be found for less than $50.
Name of the game when playing bullet. Who can move the fastest? Unless you're playing Nakamura, doesn't really matter then, does it?