[quote=jeeman]Seems like it would be much much easier to repair concrete counters than granite (which seems impossible to me). If things chipped or stained, just rip out that piece from the counter and pour new concrete and make sure it matches the rest of the counter.[/quote]
Actually a skilled fabricator can repair almost any chip or crack in granite. I would wager that you could not find most repairs I have done on granite tops.
Matching the color of concrete is not as easy as you would think, it changes color as it ages. I have not fabricated nor installed concrete tops but have done plenty of concrete finishing, based on my experience I think you would spot a repair in concrete easier than you would one of my repairs in granite.