What I find really strange is this comment from one of the lead developers of the Catapult version:
"The Catapult public chain will support higher TPS than the NEM public chain (~2 TPS)
but it will not natively support the 4000 TPS number that is thrown around so often."
Source:https://medium.com/@nemofficial/an-interview-with-nem-lead-core-developer-jaguar0625-6fe9b681ad80
I mean NEM itself is Throwing around this number 0f 4000 tps! on this page for example
https://nem.io/investors/