I have no idea where your cousin is getting these ideas from, it must be an American vision of Irish weddings site! Here is a link to a real Irish weddings site- http://www.irishweddings.ie/ Our weddings are pretty like yours, for the church bit anyway. We wear the same gowns and suits, have bridesmaids and flowergirls (definitely no wings) and page boys. The Bridesmaids walk up the aisle first then the bride and her father (and mother sometimes!) the bride's family and friends sit on one side of the church, the groom's on the other. The ceremony starts with the lighting of candles, there's the readings, the vows and then a mass. Very normal. The wedding is usually on about 1pm-2pm and lasts around an hour.
Our wedding receptions are different, we get to the hotel where the reception is being held and there is mulled wine or champagne or tea and coffee. Dinner is served around 5.30 and then the speeches of the Groom, fathers of groom and bride, bride (if she wants to) and best man are usually after dinner. After that the band starts and does the bride and grooms first dance. The band plays til arouns midnight with a break around 11 for tea and sandwiches and cocktail sausages. Aroun 12.30 the DJ starts and that goes on until about 2am then a singsong starts. I usually stay up til at least 4am! THAT is a traditional Irish wedding!