Actually, the Civic hybrids do get about the advertised average MPG.
http://www.greenhybrid.com/compare/m...-civiccvt.html
I bought mine on Jan 18 2004 and have a lifetime mileage of just over 60MPG. I drive about 50 miles to work, almost exclusive freeway and take moderate fuel saving techniques. I drive about the speed limit, avoid heavy acceleration, use momentum etc. Tires lasted about 88,000 miles and at 110,000 miles have plenty of brake pads left. No additional or extraordinary maintenance.
The car starts/runs/drives as if off the lot and have been very satisfied with it.
I bought mine at MSRP (About $1,000 over a comparable EX) and are sold almost maxed out with accessories and have extras not available on other Civics such as noise deadening frames (Filled with noise absorbers, panel insulaton etc) and other perks. Civic's are fitted with double wishbone rear suspensions, while many other vehicles the same size are fitted with just a trailing bar.
A regular Civic gets around 32MPG, with the highest hypermiling figure I've seen is in the low 40's. That's pretty good, but I've had mine above 70MPG. (See my signiture)
While I don't try for 70MPG tanks anymore, I still average better than 60 rather easily.
Both the Jetta TDI and Civic hybrid are approx 11sec 0-60.
What I'm saying here is both vehicles make great cars, get great fuel mileage and superior alternatives to a regular gasser. If someone were to post a number of stereotypical falsehoods regarding diesel autos, I'd be (and am) just as quick to defend them.
-Steve