I've measured the DI in my X7900 (which probably has some of the highest achieved native and dynamic numbers). It achieved a bit over 500,000:1 dynamic if you use it with the iris full open and let the dynamic iris operate. The native in that mode is around 45,000:1. The X7900, when used in that mode (full open, with DI engaged) does have visible pumping in scenes where the DI is operated, you have to close the iris quite a bit to make it less visible in operation, which significantly reduces the DI gain. And even then, if you are sensitive to such things you'll still see the iris in operation.It appears I was wrong but as outlined in that report it doesn’t get used very often and a factor of 5 is the same as other laser dimming projectors and still much lower than a dynamic iris which can increase it by 250x + without obvious pumping issues.
With a new lamp in my unit I'm able to run with the aperture at -11, which gets me to 80,000:1. At that point I can quite happily use it without the DI getting in the way. I'm at max zoom pretty much due to room layout, would be higher at min zoom.