Though they have said that Fedora Mix will be the standard distro for the Pi. You can therefore expect that in the future when instructions are being compiled and advice given, the primary flavour will be Fedora.
I don't see this is a problem. I think it is a good thing. Whatever the fans of other distros may say, I do think that for the well being of n00bs, a standard approach is required.
There are now several hundred flavours of Linux, some of which are probably used by less than 10 people. Ubuntu, which is on more PCs than all the other flavours put together, decided to shoot itself in the foot by not supporting the Pi. I suspect it now feels like Lotus 123 when Excel was released!
First of all, just who is "they"? The Foundation? I don't think the Foundation has said any such thing. It has enthusiastically greeted each new port into the fold. But the Foundation has already let the Genie out of the bottle. They will probably still control UK educational aspect for which the Pi was conceived. But they have stated that the design of the Pi will be free to any commercial developer who wants it. Which means they can no longer tell the Genie what to do.
That said, I think having a "standard" distro flies directly in the face of what the Pi is all about. It is supposed to be used "teach" computing science vs computer use. The convenience of noobs is far down on the list of priorities. It isn't supposed to be a Windows type box where the user could care less "what under the hood", but only "can it play my music and videos" with the click of an icon. Rather, it is supposed to be a box that forces its users to "get their hands dirty" in order to get anything useful done.
But which of us is correct matters not at all. The Pi will become what the thousands upon thousands of people who are buying them want them to be. And I dare say, someone will develop a package with a Pi, a touch screen and a preloaded SD card, all set up to play "media content" OOTB. But I don't think that will be the main use for the Pi because by the time you package all that, you'd be right back in the range of the cheap Chinese pads already on the market. You can buy a brand new Android powered 7" pad now for about $80 US.