Doesn't use mortise and tenon joinery. Most high quality dining tables use this type joinery because comercial furniture must be capable of being knoxked down for shipping. I've always found it sturdy and suited for the purpose. If anybody is in doubt about what I mean I'll try to find pictures in a catalog and point it out. But Not just now It is now 9:30 PM and my wife is trying to get me to stay awake another 2 1/2 hours to usher in the new year, I'd rather go to bed.
Happy New Year One and All! See you next year.