That is probably only the drop from the inquiries. I would guess you experience more dropping when all the new accounts report, but I could be wrong. Opening that many new accounts in that short of a period of time (ignoring the fact that it was all with one creditor - which is extremely unusual) is generally going to be viewed as extremely risky behavior. Long run, you will be absolutely fine, but in the short run, I'd expect my scores to take a bigger dip than that.
Thanks for the insight Tubpbs - yeah I'll probably see a couple more drops, I've see my score drop 3 different instances since 4/25. So I am assuming my Platinum card has not shown up yet since I wasn't approved for that card until May.