When you said "long-press"... I went: HUH!
I never thought much about it, it just became natural on the phone's UI for me.
On my Desktops/Laptops *I CANNOT STAND* long-press (or any delays built-in like that for that matter) I'm so used to processing things MUCH faster on my full on workstation machines, that any delay is like an eternity for me.
I think you've deduced the extreme problem I have with these "Toy" UIs... (and yes my smartphone is a Toy) Delays in "reactionary times" just annoy the hell out of me.
It actually annoyed the hell out of me on my Treo, until I just got used to it. So when my Droid-X had it... it was ok. Now my Galaxy Nexus, its not even a blip on my radar. Many things changed to "long-press" from a two select function, such as bulk Message management.
Bulk delete of messages on the Droid-X I had to choose the menu and "select multiple" and then check off the conversations and then select from the menu again "delete conversations" and confirm.
Now, I long-press on the conversations and hit the delete icon. Done. (I turned off confirm for it, which wasn't an option before)
So... why do I hate things like "long-press" on my desktop UIs? I expect its that I'm not in reduced functionality mode, because lets be honest, you do not get all the feedback you normally get from the Desktop programs and so on on the Tablet/Phone UIs. Like "filesystem". Evidently "nobody" wants to organize things and just wants it all to be listed or searched for. **
I guess, I'm different than most of the Consumers out there. I have no want for a Tablet... except my phone. And I only use it for critical functions... which does *NOT* include working on Spreadsheets nor Documents.
** We all know how bad Windows is with 65,000 files in a single directory. Even 20,000 files. Why have they not fixed this? Its still that bad. This whole hide the filesystem from the user might be good if it had a decent filesystem underneath. Linux (and *NIX) isn't much better, but at least most implementations don't choke until a few hundred thousand files in a single directory.