I hear that stuff all the time, but no one seams to be able to tell me what those features that are "just right" are.

   I can't assume I can right click and get anything useful

In a browser the right mouse button is generally not used that is right.

   The concept of a consistent menu bar you can access with hotkeys is gone.

Google apps have hotkeys just learn them, then you can use them.

   the input lag is intolerable.

That kind of depends on your computer/Internet line. For me google apps loads faster than outlook. But that is for me.

Our company probably saves something like 3000 USD per user by using google apps. Mostly administrative costs.

Could you list some features that are not just cause you are used to Outlook?