Unless you are ultra-positive about that measurement for that particular model bike, should it be recommended. It may be right, but if that particular method turns out to be just a tad tight, it can ruin your shain and sprockets fast. Each time you put the suspension in a tight situation, and the chain is even the slightest bit too tight, it can harm things little at a time...including bearings.
Best method is to do the 2% just one time and then check to see exactly what that ends up giving you when you put the bike down off the stand in a normal field position. You should be good from then on using that measurement.
I recommend doing this even if you have the manual. Manuals have been known to be off a bit. They give measureing techiniques that are easy for the general public to make...however they sometimes are not spot-on with this recommendation.
Now...some bikes you will find that the perfect measurement is in between what the bike adjuster will allow you to attain...better loose than tight in that situation.