Even if you forwarded the ports on the router and you have given full internet access via your firewall to BitTornado, the Windows integrated firewall (>SP2) needs to be set up for port forwarding too.
Actually I'm using ports 4554 and 4555 (beware, they're TCP and NOT UDP!), randomize off, max speed 420Kb/s, average (depending on the seeders/uploaders) is 50kb/s.