I'm only on L3 so take what I say with a grain of salt (goes without saying), but here is how things have gone with me.
L1 - didn't register any altitude before wave off and pull. Pulled early 6k
L2 - still haven't registered altitude during COA. Wave off and pull at correct altitude.
L2 - (redone due to non-currency) was able to register and recall the first COA and turns. Locked on at 6k wave and pull at correct altitude.
I'm not posting to give advice but share my experience. I have found that studying the altimeter and sectioning it off has helped me correctly identify what altitude I am doing things at in the instance I can't read it (I to have some less than stellar eyes). Taking to my instructors, learning to calm myself, register, and recall altitudes will increase with each jump. They have stressed that ensuring I pull, pull on time while completing the dive flow, and recalling their directions are more important.