Earlier quoted context omitted.
I did the same last month and then transferred back to bitbucket. The response time on gitlab.com was painfully slow. That extra 2-3 seconds waits for each commit was enough to drive me back. I still use github for professional projects and bitbucket for personal ones.
I had the same experience. The other thing I would add is that the social side of Gitlab is not as refined as GitHub's. There's no "timeline," for example. I pay for GitHub and enjoy it.
We have an Activity feed which you can set as your homepage if you'd like, though maybe it's missing features you'd like?