By the time the P5 came along, they stopped playing these games all together and started rating by clock speed alone.
Weren't the original Celerons P-II chips with half the L2 cache disabled or something? I also seem to remember they were arbitrarily limited to uni-processor functionality, and some modders found you could drill a portion of the chip to make them work on dual and quad CPU mainboards.
If that's correct, I think it's overly generous to say they stopped playing these games (although maybe they took a small break).
I also recall some folks doing something with graphite to re-enable disabled traces. Can't remember if it was related to Celerons or not.
Similar examples would be the Promise Ultra66 -> UltraRAID conversion with a simple resistor and flashing of firmware. Of course that game is still being played to this day with graphics cards.