I never find anything 
With your current Mkeys/s power, you have around 50% of the pool capacity (may be even more).
So actually the probability for you to find something is that high compared to the rest of the pool.
But luck's a bitch... My funny 0.2 Mkeys/s 32bit client could find something sooner than your keygenerator army.
It's just not very probable.
@Ollebolle22:
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I'm just waiting for a multi gpu client that can use at least 90% of the gpu cores. Then I will switch my mining rigs of 20 gpus at this project. 
For the past two days I've been fighting with a segmentation fault on my new GPU implementation and I will have to take a few steps back and build up a complete forensic test scenario to figure out what's happening.
LBC is multi-GPU capable already, but you need still quite a lot CPU power to be able to put some load on the GPUs.
The new client is way better, but unfortunately unstable. As soon as this is sorted out, I believe we can start to measure the pool performance in GKeys/s!
Oh - BTW - You actually can use LBC with a GPU mining software on the same card. LBC just takes some 20-30% of the GPU capacity, so you can have a co-existant operation.
Rico