There will be a slight dip based on the hard inquiry/inquiries, but the score will more than rebound with reduced utilization, increased # of accounts, and eventually, older accounts.
Maybe true in terms of utilization ratio but might hurt in terms of inquiries and "average account age" which gets reduced with each card added to your CR.
That's what happened to my credit report and because of that i got A/A'd by chase.
Was your case tied to average account age?
They told me it's because of how many card's i opened in the past 12 months and that i didn't have so many in the last 7 years of my CR in other words average account age.