Did you get any numbers before you started?I'm on my 4th tune file and it definitely pulls harder than stock. I wanna do a 0-60 on the ScanGauge when I get a chance to see if there's any real world difference.
I knocked almost a full second off the 0-60 times in my 2.0L car. Before the tune was just a tick over 8 seconds. After the tune, 7.2. So, yes, as long as the datalogging was done properly and OVT made the necessary re calibrations, you should see a noticeable difference.