Hi @brojitzu (+@cryptobl0ck)
I back tested this myself. The four funds start on different dates, so I began my backtest when they all existed - 30/11/2010. I got similar numbers as what @haejin said.
I included tax and brokerage fees in my backtests, removing tax from the amount invested each time there was a capital event, and the result was around 44% annualised return (44% per year). Note - they are MY expected tax and brokerage fees for my scenario - if you invest a lot more (or less) and use a different platform, those fees will be different. But assuming my numbers are "around average" - it gives you a fair indication.
I also did a simpler back test (no tax/brokerage considered) on the "less aggressive" suggested funds, and got lower, but good, annualised returns. If I recall correctly it was around 35% annualised.