I have an early 2013 Ti with the 6 spd selectshift DCT Aug 27 2012 build with 15000 miles
I do not experience any of the problems people commonly complain about.
However I did have the shuddering at 300-500 miles that came and did a couple times but it has long past since then.
As with all DCTs sometimes you can confuse it and get it to not do a perfect shift but that's normal
1965 Mustang Coupe 289 4spd
2003 Land Rover Discovery II SE
2013 Lincoln MKZ Hybrid