@ Light -
Okay, I'll use my purchase I have set up for tomorrow as an example...
I am getting a quarter tomorrow, which is 7.0grams. Once I get the bag, the first thing I am gonna do is break it open and smoke a bowl, just to relax and get rid of the "omg i haven't smoked in soooo long" feeling. My pipe holds about 0.4g fully packed, and I won't even end up smoking it all before I go to work.
Once I get home, I will finish what I didn't smoke and smoke one full more, leaving me with 6.2g. On average with this method I smoke about 1g per day.
On the other hand, even a "pinner" blunt holds about 0.7g, and if you roll a decent one you can get 1.0 to 1.5g in a blunt easily. The way I smoke (and given why I smoke), it just makes more sense to smoke out of a pipe, I smoke less per sitting and it lasts me longer.
Also, with a pipe you can use your lighter (or, if you are like me and have heavy work-related calluses, your fingers), to stop the burning process while you are inhaling and enjoying the smoke and save the bud in the bowl until you relight it. With a blunt or joint, it continues to burn while you are doing the inhaling and enjoying bit, and that little bit of burning adds up the more you smoke.
And yeah, I dunno what it is, maybe it's the paper that you use for blunts that give it a little extra effectiveness, but I've always gotten a little higher a little faster with blunts than I have pipes. Also, ever since I smoked a significant amount of hash, it takes a bit more bud to get me high anyway... And man oh man, the first time I smoked hash I was FUCKED up.