very very slow to download gmail in mail APP iPad

As I wrote in the title, in the last days, from when I updated iOS 7.04, I've some problem with the mail app in iPad 3rd gen.

With the account gmail: it's very very very slow to download the emails.

First of all, I reset the iPad, but nothing.

So, I deleted the gmail account and set up it again... but nothing.

So, what's the problem: Gmail? Mail APP in iOS 7.04? Both? And how can I resolved it?

Thank you very much for yours replay. Best regards.

Fabio Panzeri