I do think some companies are better than others, but I don't think any company is really good. They all lie. My company has a reputation for being great and caring. On paper it's true. For over 90% of people, that might be true. But they don't follow their own policies, screwing over a small percentage. So I think if you don't fall into that small percentage, then you just don't see it.
For example, my company says they don't compare people except for the highest rating. So you have to meet the "standards" (which are poorly defined btw). I know departments in the company where if you gave someone the highest rating, then you have to "pick" someone for a low rating.