Not sure about normal, but I think in normal it's pretty common since forever. Because I don't see any other logical explanation for how in 2 consecutive games I'm playing mid against a guy who gets 1 CS per wave as Kunnka, brings Tangoes but doesn't trade any harass, and uses X without having Torrent at all, and then next game it's a bottle crowing Lanaya who misses 1 out of 5 Psy Blades on me.