To earn dust with 1 TH/s, the pool is required to find a block. You need significant hashrate to solve a block with the current difficulty, so that you can split share afterwards.
I'm solo mining now and finding blocks.
I do think the person with a powerful machine plowing the low difficulties is what is jamming us up.
I'm a mining noob and I can't understand why I can't throw off these stupid 20 minute block times.