There's literally no way I could please everyone which is why I wrote down so frequently, in caps, that reading times vary greatly. Don't treat the 2.5 hours as a, "I must finish this chapter in that time." It's more about you knowing that for that day, you're supposed to read a chapter. If I put it down for 5-6 hours, then I'd have people saying that's too much time, how do I expect them to have a life outside of studying, that's a unrealistic amount of time, etc, etc. Heck, I've had people tell me, when I told them that others take multiple hours to read a chapter, that they thought I was exaggerating and that there was no way. They said stuff similar to what you've said, "well my friends and I aren't the fastest readers or the smartest, but we still finish in about an hour."
There's no way for me to predict for every single person how much time they will take to read a chapter. Hence, I'm saying this again, I put down for almost every single break day a big warning in caps that reading times vary greatly. This is actually the main reason I don't like giving estimated time per day for my schedule. In fact, I didn't give an estimated time per day in my old thread. I was tempted to just make it an all day event, but people have repeatedly asked me what order they should complete everything. I've been asked that numerous times since I created my schedule. Additionally, all day events are placed kind of out of the way. So to repeat myself, the message, "reading times vary greatly" is there every week for a very good reason.