The majority of 14.04 installations will actually occur
after 14.10+ comes out, from corporations currently sitting on 12.04, who will take a few months to evaluate 14.04, and then, finally, upgrade to it. It will be stable by the time they do this.
Because these corporations behave this way, it excludes them from the set of people Canonical has to worry about pleasing at release. So LTS releases, right on release, are actually allowed to be less stable than non-LTS releases. Because the majority of their useful lifetime, when anyone that matters is actually running them, will be spent stable.