I also think the new gunners are better: there are still some that are good shots, tenacious and will kill you but there are also rookies that get scared and just fire blindly into the air missing you completely and hoping their barrage will make you turn away.
It's much more believable and seems closer to real life, just because of the variety alone.
As for the lead, it's a matter of speed. When i first tried RoF i was so used to high speed, high deflection snapshots from flying the Fw-190 in IL2 that i couldn't hit anything, these biplanes are so slow that minimal lead is required and i was shooting way ahead of them into empty air
Our aircraft in BoB are also a bit slower than the later war hot-rods from IL2:1946 and even when comparing the same aircraft in each sim, it's a bit harder to get top speed due to the new flight models, the complex engine management, some FM issues that need correcting (most planes are a bit slower than they should) and the fact that the AI no longer fly on 100%+WEP all the time without overheating.
If we account for all these factors, an AI Hurricane passing in front of your 109's nose in a high deflection snapshot (let's say 70 degrees angle-off) in CoD might be quite a few km/h slower than a similar situation in IL2:1946, a human opponent online might be even slower if he isn't accustomed to the new CEM. Since he is slower, you also require less lead to hit him