No, this is not important IMO. I believe there was a study published about this. Yes, your muscles get saturated with creatine faster with the loading phase, but they will also get saturated with continuous use of the regular dosage.
I don't ever use a loading phase for 3 reasons.
1. I usually use creatine while doing a training cycle for a pling competition, so that is more than enough time for my muscles to get saturated.
2. At a bw of 150, that is way too much creatine for me! That would be like an extra 850 cals in a day.
3. I think it's a conspiracy by the creatine companies to make you buy more product because you use it up so dang fast that way.