Maybe this may help a bit? Indoneasia is the largest Muslem Country in the World, I believe has a Population similar to USA and is at Australia's front door.http://www.insideindonesia.org/content/view/16/29/
Just from the Australian side?http://www.smh.com.au/articles/2002/11/21/1037697806923.html
Like many things, opinions differ all over the World.
I live just down the road from a very large Muslem School here in Brisbane, and often chat with Teachers and children as they come past. Some are in full Muslem Dress whilst others are not, neither group seem unfriendly at any time.
My personal opinion is that clothes do not make a person, same as the colour of their skin or where they come from, or what their Religious Beliefs are, no matter from where they come from, many other things do. Main thing is how that person interacts with their Neighbours.