<ahem> Back on topic! I LOVE House. Currently on Season 7 of the box set - seasons 1-6 v v cheap on Amazon/Ebay, season 7 on it's own was half the cost of the 1-6 box set. Soo good. It really frustrates me that sometimes, I just can't quite tell what they're saying. I'm not deaf, but grr. I wish the earlier seasons came with subtitles too.
I don't think Diagnostics is a 'proper' department in real life, I remember Cuddy/someone saying that the department was created just for House, iirc.
I have to say I diagnosed my dad with a rare form of vasculitis after watching House. Dad had been really poorly in hospital for months and the Drs didn't know what it was. So I told them about this rare form of vasculitis.
They agreed with me, treated my dad for it for two years. Turns out he had a rare form of lymphoma and now it's spread too much. Got that fucking wrong!