The whole setup behind the Stonehenge dig (which will be presented as a BBC Timewatch series I believe) rather worries me. Thwey seem to be going into it with an agenda- trying to "prove" that it was a healing site (they compare it to Lourdes), and that the limited dig they are allowed to carry out is certain to produce evidence of this.
You can theorise all you like, but when digging, and when assessing the evidence produced, it's simply criminal not to examine every tiny assumption you may be making. Digging is destructive- nobody can ever dig that spot again for evidence, so you have to be utterly meticulous.
I sincerely hope the archaeologists involved are merely putting on the attitude as hype for the TV series. But, unlike Time Team's naive raw enthusiasm, it smells a bit.