I have confidence Suzuki is not lying about the Gen 3. Improving aeros by lets say 5% (just a guess) is a huge improvement. However, to your point, in real world performance or top speed it may make a barely noticeable difference.
The above video also shows the computer is introducing the limiter at a slightly lower top speed.
My Gen 1 had hit 194 on a gps. Was derestricted. I weighed "only" 225 at the time and had the basic "mods" (exhaust, filter, etc.). I never opened the engine. Thats was at 2-3 miles wide open throttle. 180s came kinda quick but after that it starter crawling faster. Btw - it was a long time ago and statute of limitations have passes. lol. I only did that once.