Nah 100 t20s are a tough ask at a time when there weren't a lot of t20 comps. The BBL started in 2011 or so, and so did most others other than the IPL. The likes of symonds were very good in the ones they played in (I think he has a 100 in the IPL too?). You don't need 100 t20s to know how good a player he is. I doubt Hayden played more than 70 t20s (at best) but he was arguably the most devastating t20 opener at the time of his retirement.