Say a caster casts a full round action spell with a range of touch, and uses a familiar to deliver it. The familar being the toucher can move off and deliver the touch in the same turn that the caster, cast it, right?
Additionally, can you use a MM Rod to cast a 3rd level spell and instead of your using your familiar add MM feat "Reach" to it and bump it to a 4th level spell slot?
This is true no matter what:
A spell that takes 1 round to cast is a full-round action. It comes into effect just before the beginning of your turn in the round after you began casting the spell. You then act normally after the spell is completed.
So, no the familiar cannot deliver the touch in the same turn you cast it. Or at least, in the same turn you BEGAN to cast it.
I might even argue that this would delay the spell, since, even though the casting is complete, the familiar's turn may not come "just before the beginning of your turn in the round after you began casting." And the familiar must be able to act in order to deliver the touch. So...
A spell that takes 1 round to cast is a full-round action. .
*head scratch* That's not exactly what I asked.
Wait, I found it!
Sorcerers and bards must take more time to cast a metamagic spell (one enhanced by a metamagic feat) than a regular spell. If a spell's normal casting time is 1 standard action, casting a metamagic version of the spell is a full-round action for a sorcerer or bard (except for spells modified by the Quicken Spell feat, which take 1 swift action to cast). Note that this isn't the same as a spell with a 1-round casting time. Spells that take a full-round action to cast take effect in the same round that you begin casting, and you are not required to continue the invocations, gestures, and concentration until your next turn. For spells with a longer casting time, it takes an extra full-round action to cast the metamagic spell.
A spell that takes one round to cast is a full-round action. It comes into effect just before the beginning of your turn in the round after you began casting the spell. You then act normally after the spell is completed.