Slightly, and only on higher ISO levels.
...sensor quality plays a very BIG role too. Canon has not been doing well in this last department for the past few years. Sigh...
I just don't understand comments like that. While Canon may be a bit slow on updating its APS-C sensors, I don't know how anyone can really criticize the 1D, 5D or 6D sensors. Canon customers ripped Canon for emphasizing megapixels over ISO performance, so Canon got conservative on the megapixels and produced sensors that outshine the competition in ISO performance.
When it comes to base ISO (where most people shoot most of their photos), SoNikon completely destroys Canon's ancient sensors in terms of pure IQ and dynamic range. Canon hasn't even gotten rid of the dreadful shadow banding yet. Wtf?
Canon is only interesting for lenses now days. My EF-glass lives a happy life on my A7R. A tiny mirrorless camera that blows the 5D and 1DX out of the water. The difference in IQ is so big that I'll most likely never use my 5D3 again.
I would dispute that most people shoot at base ISO. I'd be willing to bet there are a hell of a lot more people who photograph some kind of action or shooting in low light, than there are people who photograph more still scenes. Even wedding photographers shoot at higher ISO settings, many of them even shoot at very high ISOs on purpose for that grain-like aesthetic in black and white. You have all the olympics shooters, sports shooters, street photographers, wildlife and bird photographers, concert and event shooters, air show and race shooters, the paparazzi, photo journalism is at high ISO as much as lower ISO, etc.
People who shoot at lower ISO? Landscape photographers, maybe macro photographers (although if your going for extreme macro with an MP-E 65 or extension tubes, your at least at ISO 400 if not 800 or more), studio photographers (however when it comes to studio photography, you have total control over light, shadow, and scene DR, so having more stops of DR isn't a necessity...it's simply a nicety.)
Oh, and, you have amateur photographers!
However, amateurs shoot at low ISO all the time out of ignorance, not because they need to. Once an amateur becomes something else, the chances they will use higher ISOs more than lower ISOs greatly increases.
So, yeah. I STRONGLY dispute the notion that "most" photographers use base ISO. Far more things in the world involve action of some kind, in which case you are either full manual and explicitly choosing a higher ISO, or your using a priority mode and choosing your shutter speed in one way or another (leaving ISO on auto, in which case it will most certainly float above ISO 100 and 200 the majority of the time.)