I think with CR being credible it's hard to ignore the problem now. This along with the recent trend of a highly reliable brand having problems (Toyota) that there may be a small lingering effect on Apple sales. If they correct this and keep releasing great products like the next gen Touch with cameras I don't think it'll hurt them long term.
But, if they get/stay arrogant and deny problems and continue to have problems with products people will turn on them. It's all in how Apple handles this issue.