You seem to like to argue based on "data". We can argue back and forth on "data", by various sources. Eggs are bad for you says the New England Journal of Health, eggs are good for you says your nutritionist. Cherrios are good for you heart, says the AHA............and so on.
I have read in the similarites between LSPI, and good ole fashion pre ignition. In effect, not cause. I will further argue that if YOU dont know, and have read in no correlation, that does not mean that there is none.
Lets agree on somethings:
-Pre-ignition can occur when the condition inside the cylinder are such that material (in the case of published LSPI) or fuel can ignite prior to prescribed to mechanical or electronic timing
-"High" octane fuel is harder to ignite than "low" and has been used to prevent pre-ignition in high performance engines
-"low speed" component of LSPI is indicating a condition were "PI" can happen. In this case, low engine rpm, high load.
-high load=more fuel, more air
-newer TGDI engines are "high performance" as standards go
which of these do you disagree with?