The pace of S6 and S7 will be a little slower that S3-S5. CBS wanted to release 3 season in 2013, but they only need to do 2 in 2014, so they have more time. Also, S5-S7 are all being handled by CBS-D, rather than outsourcing as was done in S2 and S4.
I said something similar a while back and was quickly corrected by FrontierTrek (TrekCore), he said that their schedule is just as tight for the last two seasons, even though theoretically they'd have more time, CBS wants to stick to the same release schedule as previous years. So we'll likely see S6 in early 2014 (February-ish) and then S7 in mid 2014 (June/July-ish).