Latest updates (4/12) and SP1

Anyone know if the updates released on Tuesday require SP1 to be installed beforehand as a prerequisite? Similarly, if these latest updates are installed now (without SP1) will it cause problems if SP1 is installed later?

I have all the updates prior to SP1, so I don't feel like SP1 will really give me much, and I've seen enough posts of people with problems after installing SP1 I'm in no hurry to download/install it. But I still want to apply critical updates as they come out.