'Zipping’ as it is called in North America is international. It's only in countries with strange obsessions about queues (probably dating back to the ration queues of WWII) that people get extraordinarily hot under the collar about anyone coming past them on the approach to a pinch point. Like you, I get over early. And it has taken years to force myself not to get angry at drivers who come past. I also let drivers onto the motorway from sliproads where theoretically and legally I have the "right of way", but the only true right of way is common sense and survival. It's not surprising that the very same people who drive slowly and get overtaken on ordinary roads and motorways are often the ones who seek to obstruct other drivers at pinch points. Possibly many are also members of CLOG, who drive down the centre lanes of motorways at 50 - 60mph causing mayhem, death and destruction behind them.