I do know my s5's have never found a bitcoin block in the year I've owned them.
Now i have a s7 pointed here, hopefully it finds a block for the pool someday.
The reality is that an S7 is expected to find a block every 4.7 years under the current difficulty. Think about that for a second. 4.7 years.
So sadly, no, your S7 is unlikely to hit a block here (or anywhere). And this is a good illustration of why most miners, especially the smaller ones, prefer pools to solo; a small solo miner can hash for months or years without getting any payout at all.