I see that on the main site and from reading various thingies that there is some confusion about why some server operators were searched but didn't have their machines subpoenaed. I think that kinda explicitly says that the law enforcement in germany realise that tor nodes are useless as evidence. Well, just wanted to put that comment in because I have seen some things and this is the only conclusion I can reach.
I think law enforcement, at least in .de recognises the value of the tor network. This is very positive for tor in general.