I know this is a view that will divide opinion, but I disagree. You have a huge profile page, with loads of badges/souvenirs/images from the GSAK stats generator - all of which take time to load and eat up bandwidth. If I want to look at your profile I'm usually doing it for a specific purpose and it's unlikely anyone is going there to look at your GSAK achievements page so I would prefer it to be under the "About" tab where I won't have to wait for it to load unless I'm specifically interested in seeing it.
My own profile page has a bit of info on it, which I'm sure nobody is really interested in so it's fine by me if that's stuck away on the About tab.
I would simply suggest to make that user configurable. Means that _I_ can chose what _I_ want to see as default profile tab. This would give everyone the choice and everyone would be happy then!
I was just about to post the same thing. Have a default view tab option.
My "default" Profile Tab has been relegated to last as an "About" Tab. Not happy.