Nah, I think I'll jump to Jim's defense this time!
The white petals look just perfect to me, both visually on screen and when I fire up Photoshop's histogram to tell me about the actual RGB values. Even in the brightest areas of the petals, there's less than 20 pixels that hit 255 in even a single component.
The bright yellows, on the other hand, now those might be blown a bit. In the bright yellow stuff, there are several thousand pixels that are 253 or above in the red channel, and over 1000 at 255. A purist could argue that those are almost certainly blown. I'm not a purist, though, and I would argue that there's not a human alive who could actually tell the difference between slightly blown and not quite blown yellows that are this intense.
So I'm gonna go with "perfect" on exposure.
--Rik