Not true. You can keep your gains off Dbol only cycle if you don't do this:
1.) Take Dbol on day 1, workout first time on day 1
2.) End of cycle, last dbol taken, workout
3.) Sit on couch for 2 months and then wonder why you lost everything
If you are still lifting the same weights in the gym you will keep 95% of everything you get with dbol, LBM is LBM, period.