Try to change your DNS settings or to use some VPN (at least free one). Specially if you're from Russia (for Russia in my opinion only VPN is the cure).
Internet providers has their own traffic shaping settings and rules. For example when I used provider's DNS, CGT site opened veeeeery slowly. After I changed DNS settings to google's public DNS, speed of connection grew up. The same experiment with opening CGT via VPN gave even better result. Another option is Tor Browser, but it's not so comfortable.