I know this article addresses bike packing. But I recently did research on packs of this size and capability for a typical day hike. I made up my mind and I bought one of the packs in this survey a month or so ago. I was looking for something that would allow me to carry the load on my hips even if it was 5 lbs. or less. I would rather have the option than not. I tried a few packs including the REI Stoke 19, which I had high hopes for but it had a very short torso, so I ommitted it from the contenders. I also looked at the Hornet 24 and the Lowe Alpine packs and liked them in features and weight. I couldn't find a place to try on either pack and did read a few comments on the Lowe pack but it sounded a little short in the torso, no pun intended. So, because I couldn't try the Lowe on, I ordered the Hornet 24 and also got the bonus of using my REI 20% off coupon. I've used it three times and can say that it really carries nice. It integrates well with the body and works quite nice for me. I've a 19" torso and the pack, size M/L, is 18.25" from the bottom of the belt to the top of the frame sheet where the shoulder straps attach. Osprey is a bit optimistic with such labeling, it really is in the S/M or than currently labeled. Nevertheless, it's pretty close for me and I'm pretty stoked. I'd like a lighter weight option, but for now, its getting the job done. I know David said it could use more robust material, but I find that for day hiking, the material could have been lighter.
David, thanks for all the work on the article. It appears to be highly useful to a cross section of folks doing outdoors sports.