It matters, but I believe what he's trying to convey in a most complex and convoluted way is that for what 99% or more people are doing, it won't amount to a hill of beans difference and I agree with him. Look what the automakers used for most performance camshafts. Wide LSAs. 113-116 normally. Yet, when people ask about what camshaft to choose for a given build, people piss all over anything with a 110 or greater, when those wider LSAs above 110 are what's been PROVEN to work well on the street for......wait for it..........DECADES. But people still won't listen to what's been proven. While it's may be true you might make more peak power with a narrow LSA, a lot of other things come with it. Lower vacuum signal. A rougher idle. It can make an engine more "picky" as far as the details with running. Makes them more "moody" if you will. These are undisputed facts. Yet people keep right on building engines with race oriented camshaft specs to drive on the street 24/7. Yeah, I know. Here come all the "Mine's on a 108 or 106 and it runs great blah blah blah....." Yeah. Ok.