I incubate at 88 .7 or so and have never had a clutch go 60 days in the incubator.If you incubate at 88 degrees, you're looking at 60+ days of incubation.
52 to 55 days almost every single clutch.
I do agree they don't always come out in 2 days, that's just not true.
With how inaccurate most thermometers are I think it's very easy to be a degree or two off of what one might think they are incubating at.