I don't see much bias in the poll.
Anyway, I think these spells are alright. To me, they are best used with low-level spells that would be useless to a low-level caster at 1 rd/level and too good at 1 hour/level. Like shield, it's a great preparatory spell for a caster that knows he's going into combat. Same with the buff spells, which is why I like the change to them. I prefer spellcasters that use their spells during the course of a game, rather than all at the beginning of the day to make the characters super heroes. Thus the extra minutes are just like gravy, and not really a problem. If people want to rush into the next combat, let them, it really just means they are risking more or using up more of their non-expendable resources like potions and scrolls. If they got 'em to burn, why not use 'em?