I saw them occur just yesterday actually. Playing on the new map Maganay'urin KruggerMallencamp'Expidalioucious or whatever you call it.
I was Russian MG defending and had setup a few feet behind and slightly above some sandbags picking germans off as they came over the ridge and through some road blocks..... I unloaded on a couple and the way I was aiming, many of my green tracers hit the edges of the sandbags and ricocheted off the sandbags, upward on about a 15 degree angle, flung a bit beyond the sandbags and then flopped to the ground.
It's not as often or as excessive as what existed in RO1, but it exists none the less in RO2.
And I like that they're not as excessive as they were in RO1..... often in RO1 it kind of felt like there was a Klingon Bird of Prey flying around the map.