This is seriously one of the reasons I don't tend to buy anything I can't test or find reviewed and swatched on an independent blog, I reason that if someone has had to put their hand in their pockets and paid for a product they didn't like they will be honest about it, not something you will ever expect get from the big companies who will of course tell you their product is amazing and you need it in order to ensure the continuing advertising revenue. Magazines are usually not much better. Makeup Forever released an unretouched ad this year and the models foundation looked amazing and whilst she was probably chosen for having amazing, flawless skin it was hers and not courtesy of post-production. I don't think anyone could claim that this has harmed their business.
I am not anti-photoshop, I do use it myself but not to change the product or how it looks (I will cover up spots when swatching lipstick but not foundation or face products).
*Meaning the disclaimer is either non existent or hidden down at the bottom or in a corner.