Patches need to go through a certification period after they are complete iirc and even then it takes time to release a patch because they won't put one out for a single issue....they'll fix dozens of issues at a minimum in a patch though hundreds is more common so it'll probably be a month or two before you see them.
I have a disc copy of Stick of Truth on the PS3 and only experienced annoyances, nothing serious or terminal in the five playthroughs it took me to wrap up the platinum. Though I have noticed that in Canada it's easier for the game to get framerate drops though saving, quitting out of the game completely and rebooting it solved those for me. Beyond that I just had common issues, not all of which were bugs like the difficult button mashing sequences and such.
In the words of cartman ' yar breaking my balls man' 1-2 months.... thats unacceptable to release a game with underlying issues, even people who dont have game hampering bugs, a lot of my friends have felt the frame rates dip randomly (Though saving and rebooting does the trick). I basically paid £50 quid for a broken product. I want to restart and play again with a different character but imagine playing another 10 hours only for it to glitch again......... not taking the risk for my TV's sake