As a personal experience mine was closer to GoingLoopyLou's. I dont remember bottles being a particular faff, I was back at work very quickly and DH and I used to get the following day's bottles ready together. I remember we used to do them like a production line (scoop, scrape, tip, scoop, scrape, tip.....ahhh happy days!). Popped them in the fridge then off we went to bed.
When a bottle was needed, out of the fridge, into the microwave, good shake, into DC. We took it in turn to do the night feeds, one night on, one night off (we were both working full time). Couldnt do that breast feeding!
BTW before anyone starts howling about how terrible a parent I was, my DCs are now 11, 12 and 15 and have survived the neglect quite well.
These studies are useful and interesting. Personally I would prefer to see more depth as I think that there is a bit too much simplicity with assuming that A causes B. IMO there is far more to be discovered.