Yes it will wait until the method processing of your web service ends.
But you can design some asynchronous web services
patterns if you need to ( with callback or polling methods)
/ JeanLouis<br /><i>"software development has been, is, and will remain fundamentally hard" (Grady Booch)</i><br /> <br />Take a look at <a href="http://www.epfwiki.net/wikis/openup/" target="_blank" rel="nofollow">Agile OpenUP</a> in the Eclipse community