The well named filly
Democrat Party took 1.5 sec off the NZ 3yo Rec for 2200m when winning the Alabar Sire's Stakes final (not sure what she took off the MR as NZ records listed by race time)
You are correct that national records are recorded against gross race time. Mile rates as mathematical equations do not constitute records and in fact are of no value as such. Such records are set in mile races. If it was important to you, you could simply calculate the mile rate against the previous record time.
http://infohorse.hrnz.co.nz/datahr/r...02rs.htm#Race5
I think the royally bred
Have Faith In Me broke the 3yo C&G's Rec for 2200m when winning the PGG final (which despite the $200k on offer is only a Listed race)
but will have to await results.
It is a listed race despite its stake due to the fact it is not open to all comers but only to those sold at the PGG yearling sales. Along with this all the sales races as closed entry do not count toward stakes earnings for the respective JEWELS races.