I was talking with one of the engineers today at a company I visited and he has had a Civic 1.6 i-DTEC and is very happy with it, and he does get over 60 mpg on his 'real life' daily commute, used to put about £55 fuel in every week, now he puts about £28 (I know fuel price has come down about 20% over last few months, but that still means consumption is at least 30% better than his last car).
I am not a fan of Diesels, but over 60mpg in real life driving is pretty damn good, wonder how long the turbo and DPF will last though
modern Diesels are very complicated bits of kit, and expensive to fix.
Consumption of i-DTEC would be even better in Jazz with less weight to lug around.