Milton GO and Mondays are bit cherry-picking. Also I see 1'25" not 1'45" on the current schedule for the 2:15 PM departure. The 3:15 PM is 1'35"
But check some of the others. At the other extreme, the Meadowvale to Union (Bay and Front) 12:50 pm is only 45 minutes (and that route has arrived early when I took it). Google maps says that when leave Meadowvale GO in a car at 12:50 PM (on a Monday) that I arrive around 1:40 p.m; yes can be as fast as 30 minutes. But I'd take 45 minutes on GO any time - where I can actually work, sleep, or watch Netflix - to 30 minutes of driving (or the 50 minutes of stressful driving!)
Also (pre-Covid), compare the bus times from the Stouffville route, which has the bus-only and HOV lanes down the 404/DVP.
Not perfect - but not SOL.