I enjoy both systems. As far as attributes go, if I play a character with 8 int, I play them as incredibly stupid so I don't find point buy so much constraining as easily exploited.t.
The stat array and IQ spread on Golarion is very oddly spread. About one person in seven has a 8 in IQ (the Std array has one 8, but a few people are elite array and a very, very few have stats outside that).
That would make a 8 Int= IQ 83, quite a bit higher than Forrest Gump's 76.
But altho that's fairly close to the standard deviation of Int8= IQ80, only about one person in a 100,000 or even less has a IQ lower than that. Again due to the standard array (which over 90% of the population of Golarion has) having no number under 8.
So, 8, in Golarion is just below average. 15's are very high.
7's or even 6's are exceptionally rare. You could play those as "incredibly stupid" if you wanted too.