Aaahh, but we're encouraged to report "everything" (it's a reporting culture we're trying to establish, don't you know). Was that another aircraft I just saw? That ATC hadn't mentioned to me? AIRPROX! That, at least, would appear to be the mentality applied by some operating communities in both civ and mil. The fitment of TCAS to fast jets will probably increase the number of AIRPROX reports further due to a likely requirement for mandatory reporting of RAs, which will be somewhat more frequent in uncontrolled airspace than they are inside CAS.
Focussing on total volume of reporting is a mistake - it's the frequency of the serious ones that matters and I don't see that kind of detailed analysis being conducted in this article