I swear that DD1 would take about 20 minutes on the loo every time, given the choice. Even when she hurries, 10 minutes is quite normal. That's a long time when you're trying to get out of the house (we have one loo) and/or you have friends round who are also desperate to go.
I'm trying to think of positive ways of dealing with it. We had a rational conversation about it last night, where she admitted that she likes the peace and quiet in there ( she's the one that makes all the noise out here!! ) And that she doesn't like doing poos.
I've just introduced a sticker chart, which is unoriginal but she likes them. But they tend to lose their novelty factor after a couple of days.
How long should it take? Anyone with a four year old care to time them and let me know?! It's not just me - her friends and teachers are commenting on her slowness as well and she is beginning to acquire a reputation which she could do without.