Quick geography and linguilstic lesson on the small but complicated Democratic Monarchy that is Belgium.
Belgium is officially TRI-lingual, with the northern part, Flanders, speaking Flemish, the south Wallonia, speaking French and Brussels-Halle-Villvorde (dispite being surrounded by the region of Flanders) is bi-lingual. Finally, there is a small part of Belgium next to the German border that is german speaking officially.
Now, when it comes to who is and isn't Flemish I would say that most people who live in a community that speaks Vlaams (Flemish) identify themselves with being Flemish.
And Vlaams is a version/dialect of Dutch much in the same way in English we have different dialects for US/CanadaIrish/South African/Welsch/Scottish/Australian/ etc. etc ... it's all English, but not always the same words or spelling for things (pram and stroller, or the wonderful Aluminum-Aliuminium debate I just heard the other day).
If you come from Leuven or Herentals you are coming from the Vlaams-Brabant or Antwerpen Provence and the region of Flanders (Vlaanderen) ... I consider you to be Flemish AND Belgian, which you prefer to refer to yourself as is your choice ...
http://en.wikipedia.org/wiki/Flemish_Region
And after all that ... I do like the commentary of Marcel Wuyts ... I'm not 100% fluent in Flemish and tend to watch rather than listen to the commentary these days if I do catch a race on TV. My favorite is his use of English phrases in the middle of commentary to describe an action that just took place.
And if you really want to see why Belgium hasn't formed a government, watch this video on the insane way they structured the government:
http://www.youtube.com/watch?v=QlwHotpl9DA
I think it was made so complicated that no country dare invade for fear of wrapping themselves in mounds of Belgian red-tape, nope, it's better to move on to a less-complicated country to conquer.