"So, in closing, MB does not have a "built-in" lag. It's just slower to open the throttle."

Lag means slow response, therefore, a number of Crossfires have lag in the throttle or hesitation causing a slow response when stepping on the gas. Some of those Crossfire owners corrected the issue by installing a SB and I assume are happy with this fix. I know I am. So why the F'n argument.