BUG not IDEA
This is because we consider 1 hour to being the default.
So, a task with an estimate of 1 hour looks identical to a task with no estimate whatsoever.
Given that time estimates form an important piece of this system, I would vote for this to be changed.
I agree. If I've set a duration to 1hr then I'd expect it to be reflected in the UI. It'd be very helpful to be able differentiate tasks that I've purposely set to be 1hr long vs ones I haven't gotten around to estimating the time it will take. I sometimes find myself needlessly re-estimating how long the 1hr tasks will take.
Customer support service by UserEcho