I heard Losi got a bad name for the quality of their 1/10th stuff.
I'm sure you are right about the ratings being due to their ESC.
Looks like some good quality here.
Same 4 pole configuration as the Neu, Tekin, Castle-Neu, and the Medusa Motors.
Way over-sized bearings. That shaft is 8mm when it passes through the bearings, before being turned down to the 5mm shaft.
The Motor in these pictures is the 1700kv version. My 1300kv motor is the same, just a different wind.
Have a look:
