How do you pack your pack?

I was reading the latest Wilderness Mag today and a quote stood out that has intrigued me for a while because it is counter to my own experience. In the section on “Wild Women” under packing the advice is Keep the heavy stuff such as food water and stove towards the back (good?) and at the bottom of the pack? I have often noticed while in the likes of Kathmandu and Bivouac stores the staff advising on pack purchase putting a pack on a prospective purchasers back then dumping a weight into the bottom of the pack which immediately pulls the shoulders back the person leans way forward and assumes a very uncomfortable pose and I can’t help thinking there goes another short experience in the bush destroyed by poor advice. So at the risk of introducing a very anal topic how do you pack your pack? For me my pack of choice is a MacPac alpine Pursuit 40ltr I don’t like hip belts and I like the narrow upright carry on my back. Bottom up- first layer sleeping bag and bivvy bag, next- Hut shoes next spare clothing and hut clothes, next- Food water and first Aid kit alongside each other, next- Cooker and Gas plus days food. The top of the pack gets raincoat and the top pockets maps compass and any other aids I need for easy access. In short my heaviest items are at the top of the pack against my back across my shoulders where they don’t pull back but the weight is transferred down my back to my hips. I realise that all this is subjective but I look forward to isogi’s statistical analysis and pmcke’s practical slant despite the fact that he carries a pack out of all proportion to good reason :)