Scott,
The idea of using a pearl to overcome broken down heads is not new, but particle pearls are, in general, muchmore aggressive than resin pearls. Particle pearls will not overcome true broken down heads, so I have to guess this is a very relative idea, "broken down heads". They may just be a little drier than you are used to, ESPECIALLY with your admitted "medium ball speed". You must be used to very oily heads.
This is all multiplied by Guardian overlay which is one of the softest materials ever used for bowling lane heads. Guardian needs a lot of oil to prevent early burn-up and that often results in a high degree of carrydown problems. I know because I bowled that scenario for two incredibly painful years.
Good luck.
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"We get old too fast, and too late, smart."