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IMHO, the result will be very minimal.
Without knowing the length of all your other accounts, having 7 accounts just reachng one year old probably means your avg length of all accounts is well below average of around 7-8 years.
Length of credit history is only 15% of FICO, and is not limited just to avg. age of accounts. Date of oldest account is also weighed a factor in this minimal 15% category. What may help your FICO score more is the fact that the inquiries that led to these multiple accounts may drop from scoring at one year, but I dont think the one year maturization itself will show any meaningful results.
My Visa card turned 1 year old today. I also have a new autoloan (June) as the only new credit I have this year. My EQ score did not change but the comment on new credit when from Not Good to Good.