"This would tend to suggest that Straw et al are correct and that these Muslim men regard young non Muslim girls as "easy meat""

Not what the Dando reserachers found.

They found that victims were chosen on the basis of convenience and ease of capture.

Not being a kidnapper I cannot say for sure, but I imagine that capturing a teenage girl from an orthodox muslim family is a bit harder.

That would be consistent with the Dando institutes explanation.

And as they are the only ones who have actually done any research or looked at the actual data, it stands as the most authouritative explanation until the ceop report comes out.