I personally cannot find any late model TDIs on Fuelly that don't exceed the official combined EPA mileage by at least 10%, with the exception of the Touareg, which is exceeding its official rating by about 7%. Some TDIs exceed their official ratings by close to 20% (Passat TDI, Beetle Convertible TDI). The Cruze TD appears to be beating its official rating by almost 25% on there.
Consumer Reports on average is beating the official EPA ratings on diesels in its testing (by a few percent), while the gasoline equivalents of those diesel models tested are about 5% less on average than the official EPA ratings. This could change as it tests more diesel models, I suppose, but as of now, diesels in its testing are beating the official ratings overall.
A July 14, 2014, article in the
Wall Street Journal ("EPA Asks Car Makers to Road Test Fuel-Economy Claims" -
http://online.wsj.com/articles/epa-wants-mpg-claims-road-tested-1405355624) mentioned that while hybrids tend to underperform relative to the offical EPA ratings, diesels vehicles (in general) beat the official mileage rating by almost 5 mpg in the real world according to their analysis.
EPA itself anticipated that its 2008 revised (5-cycle) fuel mileage values would tend to significantly underestimate real-world mileage of diesels in a 2006 technical document it published. This was discussed many years ago on this site when the 5-cycle methodology was first implemented (e.g.,
http://forums.tdiclub.com/showthread.php?p=2148708&highlight=fuel+mileage#post2148708).