Hope this is the correct section.
On my Moto Droid I noticed, like others, I wasn't receiving notifications for Gmail. I also stopped receiving GVoice push notices, which is bad because I use it for voicemail.
I ran some tests today on two different wifi networks at my job.
1: On WiFi 1, sent email to gmail account, called GV from landline and left a message. Did not receive notifications after 15 mins, so I synced. Received both notifications right away.
2: Turned of wifi1, went to 3G. Did same test. Received both notifications in approx 15 seconds.
3: Went on WiFi2, did same test. Waited 15 mins. Nothing. I then just turned off wifi2, so back to 3G. Notifications arrived in about 15 seconds.
Is this normal? Is there an issue with notifications on wifi that I just wasn't aware of?