So I've tried relay.nostr.info and bootstrap my client from it a few times and all seems to work OK for me.
I had an issue with this event b19927cc51e45bff87628a15f8f643f452d67ab9c5b936163c906825be585e34 because python won't let me convert the ticks on this to a date (its year 54460?!)
But that's more my issue, I should probably be dropping this event upfront.
In addition I too a look at the specific case with large number of author, and both the split style on single worked Ok for large number (>1000) on damus relay only the split style returns, though it no longer errors/returns a notice of too many keys so it might return eventually.