The only experience I have with this issue is as follows. I opened a new credit card in March of this year. (I had a stable credit profile with three old cards and several other accounts up till this point.) Mostly out of curiosity, I watched my credit reports like a hawk, pulling them frequently, during the first 100 days after I opened it. I took an immediate score hit after I opened it and then there was no score change. For the first 70-75 days the new account did not have any "OKs" next to the payment history section, although I was using the card a small amount and paying each staement in full.
Then at Day 75 the reports started showing two OKs (for the previous two payments). Exactly at the same time I got a small but significant boost in my score.
That's purely anecdotal, take it for whatever it is worth. Maybe that's pure voodoo. But my feeling is hey, you have opened a new card, why not use it a little every month, let the balances report to the credit bureaus, and pay them in full? It won't hurt you to do that at any rate, and it is creating a kind of payment history. And if you ever need to maximize your score you can always pay all cards down to $0 except one, and keep your overall utilization at 1-5%.
