I work in an industry rife with typos, and can assure you that typos are missed all the time, and it doesn't indicate a greater QA problem or lack of QA. It's just a missed typo.
Where I work, we treat grammar and spelling errors as a sev 2 bug (sev 1 being highest.) It will quickly erode trust in your product even if everything else is working fine. All of our customer-facing text (UI/CLI/API names, labels, error messages, etc.) go through QA and also a separate documentation team for consistency and spelling checks.
Here in the UK, one of the national newspapers, The Guardian was so famous for typing mistakes that it was nicknamed 'The Grauniad' by Private Eye, which is a satirical magazine.
