Oh heck yes, I drove myself crazy for months when DD was 5-turning-6. Honestly, we tested in the end just so I could put myself out of my misery!
Now in hindsight of course I have no idea why the obvious was not obvious, but like you I was waiting for a teacher or someone to say "WOW, your kid is so gifted." But they didn't - and they probably won't ever. It's a rare one who will notice and/or care and/or even know what giftedness is. Even now we can wave the bit of paper under their nose with the numbers but hardly anyone knows what they mean (and I don't know where you are but most primary schools in Auckland don't have gifted programs anyway). So don't rely on anyone else noticing - you are the only one who will.
Wait until she's 6, then test. You won't need to know until then, when she can start One Day School/Explorer's Club. Small Poppies you can talk your way into with anecdotal evidence if she wants to join now.
Good luck
