You haven't seen Polish tram stops yet
i live in Poland, so yes i've seen a few. ;)
in Holland, i've seen more smashed windows
Merely a point of information.
When I was first (and regrettably last!) in the Netherlands, i.e. Amsterdam, during the 80's
so now we all know that you have a very good view of the situation in 2010. ;)
I think it makes more sense to look to their personal characteristics than looking at their passports. If it's looking, talking, behaving like a camel from the Sahara, it doesn't convince me if his passport is saying that he is a horse instead. Maybe you can be fooled by a passport but not me! ;)
I've heard that many Poles are expected to stay, i don't watch Dutch news very often anymore but i've never heard that only the upper class is interested in staying.
Of course nobody likes to have 10 loud neighbours. But you can't blame Polish people for being bad neighbours. If their housing conditions improve, i'm sure this "Polish" problem, which in fact is a housing problem quickly disappears.
Why? Because here in Poland, i don't have problems with loud neighbours. My friends haven't either.
And mind you, i live in a rundown Eastbloc flat that would have been demolished in Netherlands because of low quality. And although sometimes i see some shady people on the street and a bit of graffitti, in general even my communist area environment feels much safer than the average morrocan/black area in Holland.
Now look at the situation in Netherlands. The 3rd world immigrants got houses that would make many Polish people jealous (much more living space, well isolated, high speed internet etc.) and yet they turn it into some 3rd world ghetto (dealing drugs, vandalizing everything, intimidating and robbing young and old people on the street, claiming that the neighbourhood is theirs, spitting bus drivers in their faces for nothing).
So this little story shows again that the quality of neighbourhoods depends on the quality of the inhabitants. So yes, of course Polish immigrants are much more welcomed than others.
Anyone disagreeing this is invited to bring other arguments than "you filthy racist, how can you say this!" ;)