Yes, it serves that purpose, but theres no supercompensation. Its only meant to maintain what you have gained and give your body much needed rest. As a disclaimer, i am NOT IN THE LEAST a DC expert, i just try to give DC the credit it deserves.
I have never heard of anyone cruising for that long although i'm sure some trainees have due to some cause, but play it by ear. Its not a Blast for 10 weeks, cruise for 4 set-in-stone kind of thing.
I shot for an 8 week blast. The first time I lasted 7 weeks, the next time i only went six, then six again. thats just how much i could handle. If you can blast for 10 weeks and you are gaining, keep going by all means!!! but when you start to hit a wall, and you will know, STOP, cruise for 2-3 weeks until you feel fully prepared to give the log book as ass kicking again. That may be 4-5 weeks but if you feel fully recovered after 2 or 3 then GO!!! You have to listen to your body.