The answer is yes sort of.  In my experience it depends on how tightly the tongue is tied.  Depends on whether mom can directly feed at all.  I have found that if mom can effectively breastfeed directly for most of the feeds then the babe's frenulum does stretch some within the 4-6th week.  It helps if you can find out if the mom knows if the tongue tie was passed down by a family member.  In my family it came from my father who never had a speech impediment and so I was confident that my son could adapt.  With a woman I worked with as an LC she was able to directly feed with some help with positioning and in 6 weeks reported that there was no pain and the tongue didn't look "as short."

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