> I am the same way, but it isn't because I'm pedantic. It is because the company obviously employs people who are incompetent, stupid, don't care about their work, or all three at once, which leads me to fear the quality of their actual product/service.

You're generalizing the employees. Maybe it's just the marketing department, and the product is excellent. I would look for a review of the product (if it interested me at all), not base my judgement on a small error in an ad.