Tut, tut, tut......
Agree with your comments about the 1.9, though I would add another negative and that is its a smokey engine. I've lost count of the number of VAG TDi 130s with a trail of soot following them whilst the driver accelerates up an incline. I'm assuming the later DPF equipped cars don't have this problem.
The 2.0 TDi is a different beast. Common rail direct injection, more powerful and more efficient. Very good on the motorway and it feels thrusty, with good mid range - you really wouldn't think it has 140bhp. 70-100mph in no time at all, and at a cruise and on the motorway this engine in the Golf Mk V is refined (as far as diesels go). It works well. The downsides is that you notice the diesel clatter at idle waiting at lights (it never disappears even when the engine is warm) and is a big grumbly but noticeably better than the 1.9. Obviously, the 170bhp version is a corker. Take a Golf Mk IV GT TDi out for weekend for example, and I'm sure you'll come back on Monday morning with a different view.
Obviously, usual caveats apply regarding high mileage diesel and the various engine 'bits' failing / needing replacing.
PD v CR
http://www.youtube.com/watch?v=jsxLJQCBDDo