I realize I was worng with talonflame, but enough of that. Another problem I found with using serperior was ditto. If it switches in and copies your stat boosts, your in a horrible position. The only chance of killing it would be hp fire, but that mans the ditto has it too and will outspeed you and kill you. Of course they're most likely choice locked after that meaning you have a switch in, assuming that you have some kind of fire resist or heatran, and almost every team has one or the other of these, as most people would prefer not to get swept by a charizard or volcorona.
The speed debate has on wheter to go max speed or not is tough. Max speed timid allows you to outspeed or speed tie other serperiors or any other base 113 out there (I'm not even sure there is a relevant base 113 out there anyway.) Even if your going to take evs off speed, what do they go on, Sp.Atk? Seems preety irrelevant there considering the boosts, and most switch ins to serperior are 4x resistant or too bulky to knock out efficiently. You probably should do max speed very high investment in bulk or sp.atk to make it worthwhile, and at least 12 in hp for reasons I posted in an earlier reply. That's my opinion at least.