Are the stats for slots issued due to flow control, or are they also including being within 15 mins of a pending departure time during freeflow too??
I've been subject to an overload due to freeflow busters, 5 flights departed early, 5 late - one of which was 92 minutes after its P-time. Funnily 3 of the 5 late ones were the same company, they have now improved but still not angels.