Took a taste of this last night when racking to secondary... The spices weren't prevalent at all really, but I expect they were being covered up by the youngness of the brew. Definitely has a nice roasty porter flavour though, spices or not it's going to be delicious.
I did a gravity reading as well and got 1.015, down from 1.068. Just a shade under 77% attenuation, which is not bad for a yeast that's supposed to top out at 75%. The 6.9% ABV doesn't hurt either