Well as i said 'last night' since then my computer has been turned off and back on. Also my router was off all night as i thought it might resolve it.
If you check the demo you'll see exactly what im talking about, don't really know how to describe it but it's just ME thats lagging around, without having anything else effected, the gameplay in the background is still smooth (other players movement) and as i said, the balls are at a constant flow when im shooting.