Google Apps Email integration slow

Google Apps Email integration slow

I receive an email on my i-phone Gmail app,  then in GMAIL in my browser.

I have to refresh ZOHOMAIL for up to 2 minutes before I get the email there.

Even 30 seconds of hitting the refresh button is a very long time when you are collaborating on a phone conversation and exchanging documents via email

THIS is why I have not migrated my email service to YOUR SERVERS.  I just use the mail add-on because I am suspect of the speed.

Is there anything happening to speed up this service?