Can the statement “Having an unusually long lingual frenulum can cause speech defects later in life.” be backed up by any statistics?

Question

I do mean any statistics -- some controlled experiments, sieving through surveys, anything. I'm constantly being told old wives' tales by friends and old doctors' tales by doctors. I'm not asking for well-done science here, just if anybody has investigated anything at all -- any data. This sentence has been added so that this question isn't considered a duplicate of the other three with similar wording.

Answer 1

Just a guess, but how about this article behind a paywall that I have not read:

Journal of Evidence Based Dental Practice, Volume 10, Issue 3, September 2010, Pages 152–153

Ankyloglossia may Cause Breastfeeding, Tongue Mobility, and Speech Difficulties, with Inconclusive Results on Treatment Choices