Twitter ratio – restrictions?

One of my new twitter contacts mentioned that there is a ‘secret twitter ratio’ causing certain restrictions – but I do not really know what it means? Is Twitter restricting a number of friends or followers? I looked for the info on different blogs writing about Twitter ratio (ratio of our Twitter followers to our friends) but I cannot see this being mentioned:/ Actually, the ratio and its connection to human behavior idea do reflect mine. I agree that some of use Twitter to chat, some to network, some to do it all and to gather knowledge. Here’s my official Twitter ratio:
To quote Scoble, I belong to those who ‘want to learn more’ which perfectly matches my intentions:) I would like to know though if there are any rules connected to the Twitter ratio which might affect my account…