Most of the modern vehicles are electronic throttle and that delay feel is fairly common. It can be adjusted to be more or less sensitive from stock.
When the M56 first came out it had a nasty delay in it as the computer was trying to figure out the input and chose the correct gear in auto. If you went to manual shift most of that delay went away. Infinity released an updated flash for the ECM that solved it pretty much about 10 months after it came out here in the U.S.
Of course most tunes will too