Average pug runs are 2mins or more.
1:30 pug runs means you were lucky with good pugs which in most cases dosen't happen.
Efficient pug runs is highly dependent on who/what kind of ppl are running at that particular time. There are actually timezones for super leeches. ...believe me on this, It is a tested & proven fact.
Every time I wanna pop an elix, I just do about 5 non-elix test runs to get a feel of the crowd first.