when e.g. looking at Kier´s Profile Page, it shows the Tab "Profile Posts".
During loading of that page, it also shows his data from the other Tab named "Information" for about half a second.
So saying, during loading of the main Profile-Page, it shows the data from the other Tabs for a short period of time, while the page is loading.
I guess this is the bad side of things when using AJAX......