If you follow the link to the actual research paper you find that it's 90% of PM10 and 85% of PM2.5
That is, not "emissions" in general but particle matter specifically.
This makes sense because modern cars have efficient engines and particle filters so that few particles are emitted from the combustion engine itself. The remaining sources are the tyres and the brakes.
But doesn't the point still stays that contrary to the popular belief electric cars would not bring about much change?
Research paper: ..it could be concluded that the increased popularity of electric vehicles will likely not have a great effect on PM levels.
As said, and as your quote highlights, this focusses on particles. But the main emission of internal combustion engines is CO2, and other nasty stuff like CO, NOx, hydrocarbons, etc. These are eliminated by electric vehicles.
Claiming that electric vehicles only move emissions to the electric plant is unfair at best.
Are there any emissions associated with that additional 125kWh of consumed electricity? If so, where? If not, why not?