If I read that right, you verified the hydraulics by watching the pressure plate movement while cycling the clutch lever. Did you actually measure the amount of travel to make sure it was moving far enough to release the clutch? The spec on the '05's is 0.065" (1.65mm) minimum.
It's not uncommon for the plates to stick together after sitting for months, but after only six months I would think it shouldn't be difficult to break them loose. I've always done it on a center stand with the rear wheel slightly elevated, and used the brake pedal to jolt the plates loose. Easier and safer than having the bike take off toward the nearest solid object, as predicted by Murphy. Since I switched to automatic trans fluid several years ago, I haven't had a significant sticking problem.
Jerry