Nitro's (and Creator's) rating is likely based on the old rating system that existed before the automated report submission system. That is, not everyone started with 1500. I started with 1500. I'm not sure if I will include old ratings, as I want to create an analyzer for games that have complete information (and I doubt that all the necessary information can be properly extracted from old Excel files, although I may be wrong).
1. Maretti (420, 64, 486) 1975
2. BISHOP (80, 28, 109) 1956
3. AlexTheGreat (53, 3, 56) 1948
4. Gomunguls (443, 147, 601) 1918
5. Pit for LM (125, 30, 157) 1883
6. HellLight (175, 183, 363) 1848
and so on.