I'd like to see the lower lift flow numbers if you don't mind. There close to fully ported W2's.
What your guy is telling you is the velocity, or speed of the air flow in his opinion could be better. Or quicker. The head porter could pick up the numbers in all probability but in the same respect, loose on high lift flow. When fully porting a head, (Or intake, or carb...) there is a trade off that happens. Considering your build, I'd worry not...in the least...your gonna rock!