Actually I think Ashgrove 06 team was not all that talented I think however they were unbeaten because they were very disciplined and just strangled other teams. The Ashgrove 05 team were very good - they had a big and very well drilled set of forwards and slick backs. They supplied the entire AIC I backline. Between about 2002 and 2006 when Ashgrove was unbeaten they probably only had 2 really good teams (2002 & 2005?) however they were very hard to beat as they played a very structured pattern and gave opposing teams few very opportunities. They were fantastic at holding onto the ball and just wearing other teams out. They also defended very well. In 2003 for example they narrowly beat a St Laurences team that had Liam Bibo (Australian Schools player) in the centres, even though they were pretty ordinary in terms of talent.
As well as this the points made by the post above are correct in terms that the "league schools" found this highly structured rugby very hard to break. They would often go very well for 20 or 30 minutes and then Ashgrove would just break them.
I think now several schools (St Patricks, St Edmunds & Padua in particular) have improved greatly as "rugby schools" and this togther with a drop in talent (& coaching?) at Ashgrove has improved the competition. I guess another interesting side to this is where the more traditional rugby schools (St Laurences, St Peters, Villanova & Iona) fit in the brave new AIC world.
St Laurence's are in a similar position as Marist these days I reckon, they are on the decline but they are still a very strong rugby union based school in the AIC. As for St Peters, they are rising slowly but only in their older grades such as Firsts. Villanova are doing well, they have produced good first teams in the last few years. Iona had a struggle for the last two years but they seem to be coming back on the rise. Now if we look at the overall rugby union progression of each school since the AIC has started, it is fair to say that Eddies and Padua have come a long way. This can be justified by looking at the progression in the Aggregate results since 1998. Back in the early years, Padua was always finishing around 6th to 8th in the rugby aggregate. Now they are challenging top 4 each year. In 2006, Padua finished 7th in the agreggate, the following year in 2007 they finished 4th in the aggregate. And since then they haven't dropped their aggregate placing below 5th for rugby. Eddies has dramatically improved, in the years of 2007-2009 they finished around 6th or 7th in the aggregate. Last year they finished 2nd and knocked off lauries. Lauries dropped down to 4th for the first time in years. And the overall points that Ashgrove achieved was lower. In the year of 2005, I believe that Ashgrove managed to win the AIC rugby aggregate by over 100 points and won every other aggregate that year as well. Therefore, we can confidently say that the AIC has come a long way from the first years. All schools are no longer struggling and it is good to see this. I would to say that all the information about aggregate placings I mentioned above came from the information provided by aic tables on school websites as well. So yeah that's just my overview