I just came across this blog and realized that my cracks in my very expensive Rohl sink are not an anomaly! My sink is three years old and the cracks appeared about six months ago. I will upload pics tomorrow, but I too have an Insinkerator. If I am to replace my sink, it will destroy the granite surrounding it. What a quandary!!
I just had a $80,000 kitchen remodel done and I have to disagree with mr. "well known" on many levels. Not all contractors are cut from the same mold.
I did purchase the sink grid when I bought the sink. It does help hide the cracks somewhat.
It may just be a sink after all, but at this price, I need it to last many years!
Q