This is mythology.
Most of the Flyers current starters spent time at LHV with no ill effects:
Foerster, Brink, Frost, Laughton, Sanheim, York, Zamula, Ersson
The ones that went directly to Philly, TK, Farabee, Cates (after 4 years in college).
I'd say they do a much better job of development coaching than game day coaching at LHV.
Andrae has improved, Grans has improved.
The biggest problem with LHV is lack of talent, when you go down the list of Wheeler's top 15 prospects, the only ones in LHV are Andre (3), Kolosov (7), Grans (11), McDonald (12), Tuomaala (14)
Rizzo and Desnoyers were on the list last season but graduated.
Next year they should add Bonk???, Barkey, Sotheran, Bump?, Knuble? Mann, Bjarnason.
They'll lose Andrae, Lycksell, maybe Desnoyers/Wisdom/Eklind (RFAs), Gardner/Belpedio/Gleason/Peterson/Makiniemi (UFAs)
Ciernak should graduate to the SHL but is probably a couple years away from coming over.