First of all, I think this favored class bonus is ridiculously powerful compared to any other options available. It dramatically reduces the drawback of choosing a sorcerer over a wizard.
However, my actual question is about waiting until level 4 to put any points into it. I'm specifically referring to Mongoose87's post here. He mentions:
Well, really it's 17 spells - who is gonna sacrifice 1 HP or skill point for an extra zero-level spell?
But if you wait until you are level 4, you'll be able to learn 4 level one spells intermediately if you have 4 skill points to spend, right? That will make it 20 non level 0 spells unless I'm missing something.
Can anyone help clarify this for me?