Not really. Considering I have 2 radiators, a CPU block, and an Aquaero block all being watercooled. There's probably 6 feet of tubing in there now.... I just looked at my last order of tubing and it was 10 feet, and I do have a bit left over. It really depends on your case and your loop.
My old Caselabs probably had 12 feet of tubing in it, easily.