Mmh I’m not sure about that. I prefer to read for 1-2 hours rather than read 2 minutes here and 5 minutes there, especially for books that require some concentration to read, like dense stories and/or books not in my native language.
In this way I read more books, which is necessary because ... ah, I almost started discussing why to read more books, that's a different question.
Like if it was something of a sport with olympics where people compete in their own weight and it is measured in the end to the hundredths of seconds in front of spectators in a stadion shaped library cheering READ, READ, READ! Quality is mentioned, remotely, through selection, but still, the mental picture remains the same. The post smells like a training guide from a large gym franchise for readers. It's name is 'Serious Readers!'
Reading multiple books at the same time helps with this. The level of concentration required varies by book and personal experience. I can set aside a larger span of time for more complex books and read more lightweight stories for the rest of the day.