I think it should also be noted that Cousins, Akeson and Laughton played in the OHL while McGinn and Straka played in the QMJHL (well McGinn was in the OHL for his first year of juniors). And if I'm not mistaken the QMJHL has historically been the higher scoring league or am I just completely making that up?
Historically yes, the last decade or so nope.
OHL
12-13: Trocheck 109PTS, Sarrault 108PTS, Cousins 103PTS
11-12: Sgarbossa 102PTS, Toffoli 101PTS, Pearson 91PTS
10-11: Toffoli 108PTS, Akeson 108PTS, Strome 106PTS
09-10: Seguin 106PTS, Hall 106PTS, Pither 94PTS
08-09: Tavares 104PTS, Terry 94PTS, DiBenedetto 93PTS
07-08: Azevedo 124PTS, MacLean 119PTS, Tavares 118PTS
QMJHL
12-13: Duffy 110PTS, Drouin 105PTS, Currie 104PTS
11-12: Gourde 124PTS, O'Brien 101PTS, Trudeau 95PTS
10-11: Devos 114PTS, Levesque 107PTS, Huberdeau 105PTS
09-10: Couturier 96PTS, Deschamps 96PTS, Dumont 93 PTS
08-09: Riendeau 124PTS, Masse 110PTS, Lalonde-McNicoll 104PTS
07-08: Perreault 114PTS, Giroux 106, Pare 102PTS
The amount of players who eclipsed over 100 points in those seasons:
12-13: 4 (Q), 3 (O)
11-12: 2 (Q), 2 (O)
10-11: 3 (Q), 5 (O)
09-10: 0 (Q), 2 (O)
08-09: 3 (Q), 1 (O)
07-08: 4 (Q), 8 (O)