Argh! You'd think I'd know better by now, but no - long answer accidentally sent into the ether. Here's take 2, please excuse if somewhat terse.

As other posters and the links at the bottom suggest, your daughter's age is not by itself a red flag, but her frustration and anxiety are. A large portion of kids (research suggests 40%!) don't learn to read well without explicit phonological teaching, which they mostly don't get, even in special pull-out programs. So you don't need to feel you need a diagnosis of dyslexia to justify taking a different approach to learning to read.

AAR/ AAS: I had a long explanation of why I would suggest doing All About Reading first (rather than All About Spelling), given your daughter's frustration, young age, and the kinds of word mix-ups you describe. Happy to explain reasoning (and our own experiences), if you are thinking of going this route. AAR is an awesome explicit, coherent way for any kid to learn to read, regardless of whether they are actually dyslexic or just need better teaching.

Reading specialists: I have yet to meet an education-related specialist of any kind who didn't insist "I've worked with tons of gifted kids". It's almost never true. 2E kids look different, you need to test them different, and they can fake "normal" achievement in ways you wouldn't believe. If you're thinking of going this route, I'd be happy to share what we learned about finding someone who might "get it", and not dismiss you as tiger mom. You have to dig deep with these kids, and someone who thinks there's nothing there, well - they may not be very motivated to do so.

Vision: Another great suggestion. Note that it's important to look at visual processing, not just physical vision, which few optometrists actually do. (It's not about whether they eyes physically "work", but whether they are communicating with the brain in a coordinated way). Auditory processing weaknesses can also lead to phonemic weaknesses. In other words, you can have perfect hearing or sight based on the usual tests, but still have processing deficits that create problems that look like LDs. You can't diagnose on your own, but there a some easily-noted signs of some of the more blatant visual issues, and checklists for auditory ones, which I could point you at if that would be helpful.

Links: Finally, a few previous discussions that might be of interest, looking at late readers as well as what people have found to be flags for stealth dyslexia:

http://giftedissues.davidsongifted.org/BB/ubbthreads.php/topics/212491/Stealth_dyslexia.html

http://giftedissues.davidsongifted....216707/Stanford_Achievement_Test_10.html

http://giftedissues.davidsongifted....ted_child_with_possible_.html#Post228258

http://giftedissues.davidsongifted....ind_Me_of_2E_Signs_in_Te.html#Post225629

http://giftedissues.davidsongifted....4634/Stealth_dyslexia_how_do_you_kn.html