If my son is anything like his father, he'll be the same way. My DH will take his Ipad in with him, and he'll be in there for 30 to 45 minutes. Who knows if he's trying to poop, or had pooped and he's just hovering over his own smurf, typing up work emails and reading the news.
lol! My DD is the same way, but she always steals my phone when she's going so she's playing angry birds or something. It's the only time she really gets privacy having 2 siblings, but I would rather she lay in bed or something lol