It took four hours to break back into my hotspot on Friday (~20 packets/second). Someone added a password to my hotspot (WEP). I noticed you didn't have to use aireplay. Normally with aireplay-ng I can get 300 packets a second but I couldn't get an association attempt to stick. You have to generate a .xor stream with a chopchop attack (-4) then specify it as an argument (-y) to a replay attack (-3). This wouldn't work on my hotspot on Friday so it took four hours ,_,