Girls multi-task, boys cure hiccups
Having observed a sample of two(!) I have reached the conclusion that girls really can multi-task... but that's not always a good thing.
When Edward was very small he would get hiccups a lot. Sophie got them slightly less often but still enough to have noticed a repeating, and different pattern between the two of them.
When Edward got hiccups you could easily cure them by getting him to have a drink. After a few mouthfuls he would be fully focused on the milk and have forgotten all about the hiccups, which would then cease quickly.
Sophie on the other hand seems perfectly capable of drinking a bottle of milk while maintaining hiccups all the way through!
So there you have it; curing hiccups requires dedication and focus (plus a good drink), which apparently boys can do better than girls! ;-)