Until the official SHA1/MD5 sums for those ISO is officially released in FedoraProject.Org, its validity and security is doubted. It is possible for some people with malicious intent to inject a rootkit into that ISO, and make themselves able to take over your computer and data. It is not that hard to spin a rootkit'ed ISO considering revisor and friends are rather easy to use. If I remember correctly, it have happened before with a Fedora release and was mentioned somewhere.
You have been warned, so, if you still couldn't wait for 3 days more, go ahead and search for the torrents and have fun cleaning up stuff if you got rootkit'ed (^-^).