Yeah, when Co 'Scorebordjournalistiek' Adriaanse was their coach. They've also been champions once, but I think that was back in the 60s.
OK, I'll look that up. Willem II actually won it three times! In 1915/16 and twice in the 50s. Plus they won the cup twice, in the 40-s and 60s. And Roda JC were champions in the 50s (I didn't know that) and won the cup twice in the 90s (I know that but had completely forgotten about it).
But more generally, I meant that both have been in the Eredivisie for most of their existence, and to me just have more to them than clubs like Excelsior, Volendam, Cambuur, Emmen, or Fortuna. Even RKC has actually been in the Eredivisie most of the time since the 90s - and I see NAC actually has been an Eredivisie club for most of its history, until their descent in the last 10 years.
Although none of that means anything if they're just not good enough of course - and probably a lot of my perception is anyway coloured by which clubs I associate most with playing against TOP!