I haven't been mining for long but I have been unable to reset my password and access my https://fast-pool.com/ account.
It seems I registered the account with an invalid email address and the PW reset system will not accept my email address (too many characters?)

I have noticed that my Fast-Pool worker yields fewer Doge but I am not sure by how much as I have not had my Dogcoin miner running all that long and my kh/s isn't that great currently.