Currently, AI is strong. Really strong. Sometimes they miss but other times a bot can come around a corner sixty meters away and hit you with his first round fired. Bots sometimes have this "first-shot accuracy" of 100% which makes Heavy Armor mandatory because you will get hit at some point or another. It's literally impossible to avoid it. I've been out-sniped by a bot with an AKM (with a Kobra sight, most likely) at fifty meters or so in about three seconds.
On a side note, helicopters (both types) are actually just pointless to call in. The AI guns down both helis, with sustained gunfire, in about 20 seconds. It doesn't even get enough time to arrive where it was called, in some cases.