I just had someone angrily lecture me for passing too closely and for not calling out, "on your left". The cyclist was in the middle of a bike lane and I passed in the vehicle lane while climbing (SW Terwilliger in Portland). They were going ~10 mph and I passed at ~14 mph.
1. When a cyclist has a 5-6 foot wide bike lane to themselves and I enter an arterial lane to pass, I am never going to call out "on your left". (I almost always call out, "on your left", when passing in a wide shared lane/trail/mup.)
2. When a cyclist in the middle of a 5 foot bike lane passing ~2-3 feet to the left of the white stripe is a safe pass .