I'd guess quite a bit. I've gotten 2 PoS in over the past month with 330 coins.

I'm fairly new to mining... is there a large statistical difference between solo mining and pool mining with regards to finding a block?  I started pool mining and according to the site I found 7 in about 2 days. I tried solo mining for about 1.5 days and didn't find any (50% chance for finding jumped between 0.7 and 2 days). I restarted pool mining today and it is reporting I found a block already after about 8 hours. I followed the guides for setting everything up and didn't get any errors. I left the sigil wallet open while solo mining.