Okay, maybe sample was undermined due to randomness on PP received per level up.
Experiment 2:
2 dwarven wizards -- both wi15, mana 20 [mana fixed via equipment], one salamander born, one candle at xp lv6 uses exploration mode wand to wish for boost mana potions to get temporal mana of 59 [waited for boost slightly to decline to synchro.]
Candle before boost 69PP, after 114 [+45]
Salamander before 62PP, after 107 [+45]
Both bonuses checked twice same differential, does not match expected 20%. [Saves for willing to check attached in zip].
I guess it is cute that code is "simple and clear", but people in general expect end effect being same as of power armor --- 20% tot total PP which is clearly not the result. In general various testing shows that PP received via Mana/Wilpower x levelups never get Salamander bonus.