Transfer order of action

Just checking. I am moving a Web site from Earthlink to Dreamhost, and I am changing to the Dreamhost registrar at the same time. I initiated all of this about 15 hours ago.

Question: per the memos I received, I changed my DNS servers on Network Solutions to point to etc. Did I jump the gun? Should I have waited until the registration had transferred to OpenSRS? (Naturally, I haven’t seen any message traffic yet; I know to wait a few days for that.)

I know one easy answer–wait about 24 hours and I’ll find out–but thought I might ask, for future reference.