I don't commute as such, but I generally do 40-50k minimum or so a day on my roadbike.
I also try and stay off the busier roads, and am normally out very early (leaving 430-5am), but I must admit I think there has been an improvement in driver consideration since the 1m rule was introduced.
However a dangerous trend I have noticed are halfwits that overtake giving me a totally un-required 2m of space who then stay on the wrong side of the road for far far too long. One I saw recently nearly caused a head on as he was still totally on the wrong side of the road a good 200m after passing me and by then he was at the crest of a rise when a car coming the other way appeared. This isn't a one off either. I see several a week where I would have pulled back across a lot sooner.
I would be happy with someone giving me just say 75cm of space if I actually was sure they had seen me and weren't texting, half asleep, eating breakfast etc.
I do however think the 1m gap is good for more social type cyclists who may not spend as much time in traffic, even if it all it achieves is making drivers think slightly more about their passing attempt. Its ridiculous really that it even needs to be a 'law' The larger gap also gives you a bit of leeway if you are suddenly faced with a massive pothole or similar.
There are some monumentally dumb cyclists however. I was driving home the other night on a totally unlit back-road to come across two kids probably about 14 or so riding bikes going the other way with no lights, helmets or even reflectors. TBH if they had been knocked off it would have been almost entirely their fault, and no doubt the driver would have been dragged through the press by the parents.