Did you only have one CC previously? If so, you might see a score increase from adding these accounts. Sometimes people see better scores once they get to 2-3 accounts.
Having higher overall credit limits will help you in terms of it being easier to keep your utilization low, but if you already had it at a low percentage, you won't see much benefit in that regard. Utilization is all about percentage, not absolute numbers.
If you only had one CC, you will probably also see a benefit because now you will be reporting a balance on 1/3 CCs as opposed to 1/1.
Starting Score: ~500 (12/01/2008)