For years I have been applying the suggested Scrum timeboxes with good results. Now it's my time to advise others trying to apply it. My advice is to follow the timeboxes because, otherwise, we will not have enough time to complete the job in a good way. Not only because you are borrowing time, but also because probably you're talking about too-much work for a day.
My mates seem receptive to this advice, but the following day they tend to extend it again... same for every meeting we have.
I would like to show them better evidence.
In my experience, if a Daily takes 45 minutes, you cannot expect that you will finish the work for that day and you'll have to talk about the same topics the next day, making it even worse as the date progresses. But this is just my observation.
Someone should have been studying this topic before to point out that 15 minutes (or less) will be right for a day. I mean, it was not just a whim of Agile's "founders"... or was it?