The theory behind using lots of hose to a catch can is two fold. One, the long hose allows for placement of the catch can as far away from the motor as possible to keep it cooler, this combined with the long hose gives the vapers that are being evacuated time to cool. You have to use a proper catch can to condense oil vapor and prevent it from either making a mess in your engine compartment (if you choose to vent to atmosphere), or making it's way back into the intake (if you route back through the intake). Not all catch cans are created equal. Remember that the oil is in vapor form, so "most" of it can make it's way through a K&N breather or even a basic catch can. The catch can would ideally have a labyrinth design and a lot of surface area to cool and condense the oil vapor into a liquid form and maximize how much it collects. The gas pressure will still find it's way from the high pressure area to the low pressure area. Just because a catch can is shiny and has a well known logo on it doesn't mean it works. Spend a little time doing your homework on the right catch can.
That being said, I would not run that setup. Might as well not be a catch can there (not saying it wont work at all), I just can't imagine it's too effective.
