No they often have a shorter punishment. Ian's dog punishment was only 24 hours. Brittany (BB16) had one of the more brutal punishments where she had to kick 2500 (or something) goals in 24 hours. Sometimes houseguests are tied together or handcuffed ...those are usually 48 hours. It's not always a week.
When the Power of Love overcomes the Love of Power, the World will know Peace