By the way Hungary supports accented domains for some years now and the experience shows that they are not used at all. Penetration is so low that I couldn't even tell you one to test.
(We have, for example http://wikip%C3%A9dia.hu/, but it's rather a test than a real usage.)
Apart from that Wikipedia is large enough to create trends, so by no means take my comment as an opposition.
grin