Try a tracert command from your windows command prompt (cmd) to www.black-tgirls.com and check for any 'hops' that time out or have a ping of more than 150ms. This would indicate a problem with a node that comcast use. I belive the btg server is in Europe somewhere so your requests will travel a certain route which might have issues. If this problem
occurs it will be an issue with comcast. Also you will find that this effects you in your current location only. Reporting it to comcast should mean they fix it but it usually takes them between a few days and a week before they realise a node is down so it shouldn't be too much to worry about as they normally fix the issue without anyone having to complain.