This does take a bit of getting used to, mostly because people instinctively expect it to work like a smart phone where as the d10 is set up to work in a wet environment with salt wet sails and ropes flicking off the surface.
The buttons trigger when you lift your finger off the screen. So you get the physical comfort of touching something while you wait for the ping and the accuracy of a lift vs a push and lift.
The actual touch required is 0.3 seconds. If a 1 second error is an issue the 4 minute can be synced to by just pressing the circle again. We did look at adjusting the times based on when the button was pressed, but it didn't actually make a material difference to performance on the water. Based on feedback trust in distance to line is a lot more important.
The reason we went for touch is that it removes the perishable buttons and reduces the mechanical challenge in terms of waterproofing the unit, which should make it more reliable and last longer.