I don't cut much firewood with a crosscut saw, but I love to compete in crosscut sawing contests. The main difference is that when cutting firewood, you have to work all day. In competition, you are done in a few seconds!
The saw in the picture is NOT made in the USA! It is a racing saw, made in New Zealand. Notice that the teeth are actually a part of the rakers. That is to say that the rakers are filed to do both jobs, cutting AND raking out the cerf.
I have my competition saws sharpened and set by a fellow down in WA. It costs roughly $150 to send a saw down, have it sharpened and set, and sent back. The saw itself cost just south of $1000. (A lot more than most chain saws! You gotta be serious about this stuff!)
Adjusting the set is at least as important as the actual sharpening. My racing saws are each set for different types of wood. Frozen soft wood, soft wood, and hardwood.
I started in the Timber Sports while in college (a couple of years ago...) I later competed professionally in contests with the same guy for 37 years, but he died in an accident in 2011. So I started training up my #1 son, Jason, to saw with me. It took several years of competing and practicing, but I've got him well lined out and we are doing quite well.
The best part of competing in the Timber Sports with "20-something" sawyers, is the look on their faces when they get whupped up on by a saw with an old fat guy on one end who is on Social Security!
Pete