That's correct. There has to be a certain amount of 'sharpness' in whatever touches the screen before it is recognized as intentional. This is a software selectable setting. On other devices, like the Hitachi VisionPlate, the setting is more sensitive so it actually behaves more like a touchscreen. You can't really use the 770 like a touchscreen as it's shipped. You have to use the stylus.

This is all due to a pattern of decisions made by someone about the display, 4.1" or 10.4 cm, its size in comparison to a finger and the design of the Maemo GUI itself. The result is that the 770 is designed to be used pretty much the way that a desktop is used.

Anyone using the 770 as a book will not be able, as a result, to turn a page with a light touch of the finger to the screen. They won't be able to make their fingers dance across the screen to manipulate a GUI that is designed for touchscreen use by a 'finger'. They'll have to, instead, search for a poke of a sharp fingernail or use the stylus.

Fixing this will require 770 apps that require this kind of interaction, where fingers can operate the 770's display in a 'dance', as many touchscreen apps allow, to contain a software fix to specifically allow finger dancing by increasing the sensitivity of the touchscreen sensor. I assume, and hope, this is an adjustable setting.