Claim: Florentine and Tuscan can be distinguished from Standard Italian by differences in phonology, morphology, syntax and lexicon; the most commonly noticed is the gorgia toscana, a consonant-weakening rule widespread in Tuscany in which the voiceless plosive phonemes /k/, /t/, /p/ are pronounced between vowels as fricatives [h], [θ], [ɸ] respectively.
Verdict: SUPPORT