No, it doesn’t matter. The font was enhanced with a digital signature and some default OpenType features. See this earlier thread, which explains a bit more, especially about the Digital Signature.
Open the exported font in FontCreator, and take a look at Font, OpenType Layout Features. You may find that some basic features have been added to your font, depending on whether or not it contains certain glyphs such as ff, fi, or fl ligatures.
I tested with a free font called Yolanda2.ttf and found that Yolanda2.otf contained a fraction feature. If an application like Word 2010 or Serif PagePlus is used with this OpenType font, and the fractions feature is enabled, then typing 1/4, 1/2, or 3/4 will perform an automatic Glyph Substitution to replace them with ¼, ½ and ¾ respectively.
