A system designed to measure the degree of shared meaning between two sentences on a scale of 0 (no similarity) to 1 (perfectly equivalent) analyzes the following pair:

Sentence A: 'The delivery driver was late because of heavy traffic.' Sentence B: 'The package arrived behind schedule due to road congestion.'

The system outputs a similarity score of 0.95. In your own words, critique this score. Is it an appropriate measure of the shared meaning between the two sentences? Justify your reasoning by identifying specific similarities and differences in the text.