Jerry,
Thanks for the interesting information. I'm not sure exactly what it tells me----perhaps that a lot of people ordered 5s by mail after reading about the extremely versatile blade size and handy overall length/weight. Perhaps that a lot of purchasers had smaller hands than I do. Maybe that users were willing to make the smaller handle work for them because they liked the other dimensions so much.
When I initially purchased the entire set of Basics, I also assumed that the 5 would get the most carry. It was only after using them a lot that I came to prefer the 7's grip. However, I'm keeping the 5 in case my next girlfriend needs a knife that would be close to perfect for someone with smaller hands than mine.
By the way, I REALLY like the 3 for field dressing game. It is convenient for work inside the body cavity and great for skinning. If for some unforeseen reason I didn't have the 7 with me, it would also be sturdy enough to bust joints, pelvic bone, etc.
Thanks again.