Increases in Mass are definitely apparent.
I did two measurements the other day. My arms have grown 1/3 an inch since the bulk, and 1/2 on my legs. I'd like to get an increase of an inch on both bodyparts by the end of the bulk. Also, my weight has gone up, I hang around 209-210. I want to be 210 by the start of February. My waist is still down, and my 6 pack is still visible, so although I've gained a little bit of fat, its still a majority of muscle! :)