With Microsoft putting so much emphasis on Natal, many have questioned what kind of lag the player would have while using the new motion controls. MTV Multiplayer was able to get some hands-on time with the Natal and had this to say,
I had a pretty large sample size, sitting through 5 demos, capturing about 40 different movements from a variety of journalists. Across those 40 movements, the fastest life-to-screen transition was .08 seconds, while the slowest was .12 seconds. A tenth of a second was the consistent average, though.
The fact that Natal is not one to one can be problematic to the hardcore gamer. Although Microsoft speaks highly of the Natal, I think that this evidence shows that Natal will not replace the controller.