I've finished my auto to 4 speed manual transmission conversion and have completed 0 to 60 mph runs with both transmissions. And yes the manual transmission is a bit quicker. 0 to 60 with the auto trans was 18.5 seconds and 17.2 seconds with the manual trans. I would think if I wanted to abuse the car at launch the manual trans time would go below 17 seconds.
This is a low mileage car (87,000) and fully serviced including injector timing and rebuilt injectors.
Manual trans video here:
https://www.youtube.com/watch?v=PCxcreZvmPQ&feature=youtu.be
Auto trans video here:
https://www.youtube.com/watch?v=zJh2bx2Jk_4
Tim