If you'd read past the hype and slack journalism, you would realise that they are only talking about the smaller 'bluestones' that actually were there before the larger sarasens. It has been an accepted fact since the 1920's that they came from the Preseli hills, in fact, it wan't that long ago that they discovered one of the quarries they came from at the outcrop of Craig Rhos-y-felin, they have also accepted that, unlike previously when it was believed the stones were transported by sea, it is more than likely they were actually moved over land.
The only thing this 'new' discovery has found is that, rather than being quarried exclusively for shipping to Stonehenge, they actually just 'robbed' an existing smaller henge in Wales to supply stones for Salisbury plain.
The whole thing either points to an ancient example of extreme recycling or an effort to boost the spiritual importance of Stonehenge but incorporating older sacred stones into its structure
