As one of those very light riders, I can assure you nothing has changed. Everyone with lower w/kg and more watts is usually faster on the flat than me. Heck I have to do 5w/kg when overtaking to avoid getting parked behind some bigger rider going easily, then they can easily draft me with far less w/kg and stay there. I have to do huge effort to get rid of them out of draft.
Or usually I just do a u-turn when I want to be left alone.
I’m also relatively tall for my weight so I have that against me.