I received my XP's immediately after the round.
It's even better than that!
You receive the XPs immediately after the event making you eligible:
- CDP bonus with the first stroke, i.e. when you click the mouse for release.
- shot XP, one by one, with each stroke.
That is why "one shot" is sufficient for the CDP streak.
Same applies to the CC XPs when a CC pass is used, and the bonus %% from CC membership for each event: Added immediately. You can check the accounts for proof.
Only the game bonus XPs and the display panels count and appear at the games' end.