Eli51: A Bochur should daven Schacharis whatever time he davens when he is in Yeshiva during the Zeman. If he davens any later than that he is showing Hashem now that he is off from Yeshiva He is taking a rest from Hashem
Do you think a bochur should learn during bein hazmanim the same amount that he learns during zman?
Explain, in your own words, what you feel the function of bein hazmanim is?
(As far as standards in Halacha/Avoidas Hashem (such as missing zman krias shema, or watching movies), I agree with you, that there is no difference between zman and bein hazmanim, and lowering standards when out of yeshiva indicates a general lack of sincerity or devotion.)