I can't stand fingerprints on my monitor, but I don't even notice them on my phone or tablet. Before I got my first touchscreen phone, I was pretty sure the dirty screen would drive me bonkers, but that never happened.
The oleophobic coating does vanish with use over a period of time. That's why you wouldn't see fingerprints and such on a new device, but would on an older and well used one.
[1]: https://en.wikipedia.org/wiki/Lipophobicity