This year it's an 18 team competition so there's 9 games each week. Mathematically, the odds of picking 9 out of 9 will be greater than picking 8 out of 8. Theoretically, it's a 23 round competition but in reality it's only 22 full rounds because rounds 11, 12 & 13 are "split" rounds with only 6 games per week thus giving each team one week's rest mid-season.
Round 1 will be excruciatingly long, being drawn out over 9 days starting with the first game (GWS vs SYD) on Sat Mar 24, then Rich Vs Carlton Thursday Mar 29, Coll Vs Haw Friday Mar 30, then 4 games on Saturday 31st & two games Sunday April 1. Round 2 is spread over 5 days with the first game on Thursday April 5 and the last game on Monday April 9. From then on it's pretty much back to normal (Friday to Sunday) except that Anzac day is on a Wednesday and there are one or two Thursday or Monday games thrown in for some weeks.
I suspect that these extra long rounds with more games will be frustrating for many tipsters who are looking for instant gratification and are used to a shorter time span. No doubt the AFL is looking to dominate the airwaves and maximise their coverage.