Myfico is likely overly concerned with your average age of accounts, more so than the hit of the inquiry. I know they are (or affiliated with) FICO itself, but do they pull actual bureaus, or use a different algorithm like 'free' reporting from banks, etc? If you've been trucking along with older credit profiles for awhile, a few new lines can definitely lower it a tad.

But honestly, scores are only a pride thing, unless it stops you from qualifying for something you want a line on. I've financed airplanes with lower scores. What does it matter?