That's not a coincidence. It makes perfect sense that a large heavy aircraft like the 380 will be harder for wind and air pockets to push it around, just like big ships are far more stable than smaller ones. There's a world of difference between coming into (say) Singapore with its turbulent tropical air on a little a320 and a giant like a 380.

I've been on narrowbody flights where we bounced around like we were inside a washing machine; in a 380 i've barely ever had to even pick up my drink!