New account vs Old account

Hi,
I'm playing with traffic arbitrage, buying traffic on Adwords and converting it on Amazon (using my bridge pages).
I have a question for more experienced users:
Does your account's age makes any difference with CPC, Quality Score or with overall traffic quality?

Let say in these cases:
1. One week old account vs 2 month old account
2. 2 month old account vs 1 year old account

If yes - how does it affect on cpc,QS ?

Thank you for any help,
I'm trying to improve my ROI. I found some competitors which do the same, but after i analyzed their job - I think that they have much lower CPC than me, but the structure of the ad campaign, ads, keywords - mostly the same. And my current average Quality Score is 7.
So I'm thinking maybe having and old account gives you better "rules" to play that game?

Thank you

I'm no expert, but it's my understanding that your account's history will only really affect you negatively as opposed to positively. In other words, if your account has a history of low QS, then it will be harder to get high QS over time; however, historically high QS won't necessarily give your ads a boost over time.

account history doesn't affect QS or CPC at all...
All it affects it, your ads aproval time..

On new accounts, some ads may take up to 72 hours to get approved... In old accounts, the same will be approved within 4 hours... usually within minutes they get approved