Accidentally responded only to John, here is my note for the list.

---------- Forwarded message ----------
From: Nico Kadel-Garcia <[log in to unmask]>
Date: Fri, Jul 4, 2014 at 9:55 AM
Subject: Re: [SL-Users] Re: Scientific Linux 7 ALPHA
To: John Lauro <[log in to unmask]>


On Fri, Jul 4, 2014 at 9:19 AM, John Lauro <[log in to unmask]> wrote:
> Looks like the first usable C7 builds were around the 18th (didn't realize they were out, just decided to check) and sound a little rougher (at least when first released) than SL7.  However, the C6 builds took a very long time compared to SL6...
>
> One question...  Is it expected to be able to upgrade to non beta from the current alpha, or will a reinstall be required once it is out of beta?

The CentOS beta builds are not on the public mirrors. SL is, in the
"7rolling" repository. SL started out with a real handicap, having to
deal with the new git.centos.org structure.

And the CentOS nightly build packages are not GPG signed!!! That
leaves the possibility of a man-in-the-middle proxy replacing any, or
all of the packages as people download them.