Since Gmail has launched the newer version of their email, it takes a little bit longer to load your emails for the first time, this can also be terribly slow if you have a slower internet connection.
If you are eager to see a summary of your inbox before Gmail loads, you can now do it with a new feature released by Gmail Labs called Inbox Preview.
Once you have enabled Inbox preview from Settings > Labs, there will be no change initially, however the next time you login to your Gmail account, you will be able to see a preview of the emails in your account, while Gmail is loading.
The Inbox preview will let you take a quick glance of the latest emails in your inbox, so that you don’t have to wait for Gmail to load fully, definitely useful if you are on a slower internet connection and Gmail takes a long time to load.
If you are having problems loading Gmail, do take a look at the different ways in which you can access Gmail using different Gmail Modes.
New In Labs: Inbox Preview [Official Gmail Blog]