I spent hours and hours researching LSPI before making the decision to purchase a turbo GDI. High load, low speed is the combo for thr highest chance of experiencing LSPI.
SXT, the nice (and bad thing) about the manual Forte's is the short gearing. Wanting to accelerate in 6th gear isn't an issue - but flooring it would be. Since your car is already turning 3200 rpms , its not nearly as bad doing it while turning 2200 rpms.
First thing I told my father (who test drove the car last night as he wanted to see it - yes guys I picked it up last night) to rev the absolute PISS out of it opposed to lugging it down.
Always, always, always downshift a gear when wanting to get that power. These GDI motors like to be spun.
Speaking of the velosters, supposedly the 2013s were manufactured with weak rods and a bad tune, 2014 the rods and pistons were improved, and 2015 improved again with better rods/pistons and a better tune.
That said - DOWNSHIFT! Automatics, you guys have less to fear.