Nope... no doing, too young still. I just started from seed last year. I'll need to baby sit them this year. They really do need another year to get established and build up vigor.
If there are more than 3 spears from a crown, and the spear is at least finger size, it actually is good to harvest sparsely so that there are not too many spears trying to grow and then go to ferns... it will deplete the roots a little actually, before they actually will feed the crowns. I agree with not "harvesting" a crop but a meal would not hurt if there are a couple of size from each crown...
I checked on the asparagus this morning. There's a lot of pencil or smaller diameter sized spears coming up, very few the diameter of a sharpie or larger. Some planted crowns have not sent up spears at all yet, I suspect they will soon though.
I plan on side dressing both sides of the row with barn limed cow manure scrapings from the cattle run-in it needs to be cleaned out anyways. This should feed the roots well with each rain. It's still a little early in the season for asparagus. But thankful for signs of life in the bed.