In D&D 3.5, there was a rule that a spontaneous spellcaster had to spend extra time casting a spell if they chose to apply a metamagic feat. Is this also true in Pathfinder, or was this limitation removed?
I noticed that the Quicken Spell metamagic feat specifically notes that this rule doesn't apply; but, I couldn't find the actual rule anywhere. If the rule still exists, please provide an exact reference in the Pathfinder RAW. Thanks!