I think that a lot of this thread is based on a reputation that has been given to Strootman because he's been in Holland's NT setup and Holland has a big reputation as a national team. However Holland is going through a lot of changes currently with a lot of young new players coming through. They are currently not as strong as they were in 2010 and the young players will need time to devellop. So Strootman being in Holland's setup doesn't automatically make him a great player at this point.
Just crossed this article (of today) in AD (dutch newspaper). It's an interview with Wim Van Hanegem (former Holland and Feyenoord legend) who talks about the Dutch U21 squad Eurosquad:
http://www.ad.nl/ad/nl/1050/Jong-Oranje/article/detail/3451697/2013/06/03/Ik-ben-echt-geschrokken-van-de-laatste-weken-van-Strootman.dhtml
I translated the part about Strootman:
By the way, I'm not Dutch as some seem to suggest. I just watch a lot of the Dutch league because I have a strong link with Holland, with my business being based there and all.