Put clothes in, start it - it estimates 35 units of time. Come back in 15 minutes to check, it says 15 units left. Come back in 15 minutes, it now says 21 units left.
I am, like all of us, unsure of the fundamental nature of time. But the dryer even more so. The units are not one standard length, and they don't move always in the same direction.
Valve time; the phenomenon is often observed in software development, with some calling it the software development time.
Jokes aside, reading this thread makes me appreciate the old junk for the washing machine I have around here much more - at least it's accurate with time!