If this is the first time you have fimmed then all though it takes a bit longer to start flowering you should notice a lot more crystal development imo as the plant has basically been attacked i am a great believer in the fact that among other things thc,resin,crystals etc. are part of its defense system.
Apparently a 36 hour dark period before 12/12 flowering can help to kick start flowering if you need them to come on quickly.
Obviously 36 hrs darkness is a trade of on the growth you would have achieved and the speed in which you want them to show sex.
When you attack the plant,fimm it,it puts our more tops in defense,then more fimming more top more oil more thc etc.
This is all just my opinion though and i have no evidence