The issue is not related to Intel 520 drive itself. The problems were observed mainly on Lenovo, HP and Dell laptops, and it has been CONFIRMED that after updating IDE ATA/ATAPI controllers drivers, the problem is gone. I have just fixed this issue myself by updating my Dell 17R SE laptop's SATA driver.
This is why Intel is not doing anything to fix their issue with the drive, because there is no issue with it.