Storytelling has always been a strong tradition amongst the Irish people, from whimsical fairy tales and breath-taking legends right up to celebrated authors of the more modern age such as James Joyce and C.S. Lewis!
However, before everything was written down or recorded as it is today, the Celtic people used to have to memorise their folklore and pass it on through word of mouth. This is perhaps an ancestral explanation for the Irish seeming to excel particularly in the genre of short stories (although they are famed for some rather longer scripts too – looking at you, Ulysses!).