Here are a few possible reasons that manufacturers are not setting the pulse rates higher.
1. New algorithm required to calculate the faster pulse rate, easier to just use the old 4x algorithm.
2. Pulse rate may effect lumen output. There may be a sweet spot with these LEDs. It is up to the projector manufacturer to come up with fastest pulse rate, while not sacrificing lumen output.
3. The speed of the DLP chip itself is a limiting factor. It is not capable of keeping up with the speed of the LEDs. I believe it should be able to go much faster than what we are seeing with the Qumi.
I am guessing number 2, need more data to come to a definite conclusion. Any other Ideas?
Epson Home Cinema 3010 Projector____Paradigm 9SE MK II Main LR
Yamaha RX-V667 AVR_______________Paradigm CC-270 V.3 Center
Emotiva UPA-5 Amplifier______________Paradigm PS-1200 Sub
Sony BDP-570 Blu Ray_______________Polk bookshelf for Surrounds