Interesting article on Triple P, though that is not a program that was looked at for trauma treatment specifically because the population that is in the research has not been identified as experiencing trauma and it is not a clinical intervention, The only review of it on the CEBC in relation to child abuse is primary prevention. The definitions of each topic area give a clear picture of what was looked at for the rating in that area.
There are also adult trauma treatment resources on the CEBC http://www.cebc4cw.org/topic/trauma-treatment-adult/. You can delve deeper into the research that leads to the ratings on the website as well.
I would agree that all research needs to be taken with a grain of salt. I would also echo that it is not one size fits all, and that you need to look at individual client needs. There are a lot of complicating factors that surround research studies, but they certainly provide us with more information than simply using "treatment as usual"!