I think it is pretty much common sense that a baby in a rear facing buggy will interact more with its mother!
Please no one hound me I am currently 36 weeks pregnant and have purchased a forward facing pushchair for my newborn- as it is more practical for public transport, less expensive, and smaller for getting in/out of shops etc.
I had a rear facing buggy for my first daughter, and bought a forward facing one when she was 3 months as I was fed up with my (v.expensive) rear- facing combination pushchair.
Perhaps this is because I don't drive... a lot of people have recommended bugaboos and the like to me, but they drive everywhere and only use their prams for sunday morning strolls to the park (ok I am exaggerating slightly).
Yes I feel guilty that when my newborn is in the pushchair he wont be able to see me, I agree with the research, but I also actually have to use my pushchair for everyday use- the school run,shopping (oh yes forward facing buggies do have better handles), and bumping up and down stairs at the tube station.
I dont think this research is intended to make me feel guilty, but it does... however I still am not going to buy a rear facing pushchair.