Yes, my concluding simile was weak. Plenty of people can drive on the road like they would on a track and tires make do make a real difference just the same on road or track. Touché, good sir. The whole video just smacked of low-brow idiocy; "Who needs focus charts!? They don't mean anything [to me]!" It's like, yeah, no shit, it shows. I just thought it was kinda funny to think of someone sitting there watching the youtube video and pondering to themselves, "Wow! I really can't see a difference between those fancy-pants lenses and that cheap kit lens!" At least for those people, it probably is good advice, they shouldn't waste their money on something more than they'll use. Edit: Also I just can't help but chortle at his scowling face on the title screen of that video. Did he really charge his client after not showing up?