Ya'll,
Well, I finally got my omni hooked up to the jeep today. I was absolutely amazed with the difference. I was using the basic orinoco gold card with it's internal antenna. I then inherited a cushcraft 5.2 dbi omni. In my previous stumble attempts, I averaged about 30-35 AP's over a two hour period, and this was consistant, as I am trying to get consistancy.
Today, I snagged over 140 ap's, following the exact same routes.
I'm sold!
So, to all the newer folks (like myself) if you're going to stumble and you're interested in finding as many as you can, opt for the best antenna you can afford for your particular application.