Conundrum: VZAccess Usage Limit on Macbook Air

Hello,

I got a Macbook Air a couple months back, and I am using a USB760 Verizon card for my regular internet access. With VZAccess Manager, my data usage limit is 5GB. VZAcess Manager is working on my Macbook Air, so that's not my issue.

I am a casual internet user, surfing the internet, email, Facebook, etc (I limit my audio/video internet usage as I know that consumes more data). Before I got my Macbook Air, I had a Dell laptop, and when I used the same USB760 Verizon card for internet, I rarely ever got past using 3 GB a month, even while using the internet almost daily.

After using the same VZAccess Manager card on my MBA, I've noticed a dramatic spike in my data usage consumption. Last month I had to stop using the card for a week just to keep my usage within the monthly 5 GB limit, and my internet habits have not changed since transferring from my dell. Even as I write this, I have used over 1 GB in just 2 days. Do MacBooks just consume more data than PCs, or is there something on my mac that I can adjust that is consuming data much faster than normal? Again, the internet still works fine using this Verizon USB card.

Any advice or direction would be much appreciated.

Thanks,

Bobby