Yes, the methodology is key. Be interesting to see if it's been "peer-reviewd" for a start! (Although I think that only seems to be a requirement when you're opposing further impositions on motorists
)! From what I remember, wasn't this based on a study where someone had to do a slalom course whilst also doing some taxing mental arithmetic over a hands-free? If so, that's just lousy research. Hell, if I was trying to do that just with someone next to me, never mind the phone call, I'd probably be worse at the slalom!