Does the mail app in iPhones still use POP for Gmail? Or is it updated to use IMAP? Does the mail app in iPhones still use POP for Gmail? Or is it updated to use IMAP?
If you pick the Gmail option when setting up your account, it will use IMAP. However, if you set it up as descibed here, it uses ActiveSync. Doing it this way gives you push notification as well as contact and calendar sync.