We get it 3 times a year and the planet rules communication and travel and so forth. When it goes into reverse delays are inevitable, but this doesn't just suddenly happen on the day the retrograde begins. In the build up to that day you can begin to feel the slow down. For me that sort of thing has been prevalent this week - and it's only Tuesday!
I also think I have confusion over the day that Mercury goes into reverse, I believed it to be Friday, but lots of people are talking about Thursday. Just for clarity I am going to check this out, but it doesn't really matter in the long run.
I often find that the worst of delays and miscommunications come in the days leading up to the actual retrograde day. Once we get into the thick of Mercury in reverse we kind of get used to the delays and mix ups etc. If you find this kind of problem arising in your life this week, you know who the culprit is.
People also assume that once the day of Mercury turning direct arrives - which is December 13th this time round - the delays and such stop. This isn't the case, you can sometimes feel movement just before the direct day, but for things to be back on an even keel usually takes a couple of weeks.
Like I said in a previous post, we fair better during these times if we go with the flow and recognise this is a time for delays and such, and do our best to weather the storm by using our time wisely, then Mercury Retrograde doesn't have as much bite to it.
Just go with the flow.