I’ve only got limited experience of the guitar-based music scene in NL and still haven’t had a chance to visit the country itself, but the impression I have got is that particular music scene tends to revolve around volkslieden sung in the various dialects of Dutch (such as the band Skik singing about a bike ride in a dialect that many native Dutch speakers from the West of the country were struggling with as its a wierd mixture of Dutch and German). Although English language content is popular they get a lot of it via mainstream media – and there is also EU funding for the local language stuff..

BTW Holland is only part of the country, the entire nation is the Netherlands. Although its often accepted as a shortcut term for the whole of NL some people in other areas do not like it – its like when Americans use England to refer to the entire UK (which pisses off the Welsh and Scots).