1. Torrenting draws the battery fairly quick, you need to leave it plugged in.
2. Speed is lower (At least for me). As a comparison a Slackware 12 dvd image usually has enough seeds in my fiber area (same country, same operator on fiber we have full 10 Mbit between us) yanks 3 - 4 Mb on the pc but tops out at 150-200 Kb on the tablet (I saw more but just spikes).