Thinking about this some more - I seem to remember Nick stating in the last year or two that the Romans had broken his record - maybe for faster seller? - I can't remember quite what. In any case it looked like they sold really well but the Germans have clearly surged back. It bodes well for the mini set coming later in the year too. As well as for future German sets - I think paras would be a big winner.
I would imagine his Civil War sets did well too. The cavalry range, especially given the number of poses now, and that they can be used for both Civil War and Indian campaigns, must also be a big success.