TAD vs. TDD vs. paired TDD

This is a repost from Jeff Langr where he simply models how TDD is quicker than TAD and paired TDD is quicker than either of the first two.

Simple but effective.

TAD:
CCCC xxxx TTTTT xxx IIIII RRR II

TDD:
TCTCTCTC xxxx IIII xxx RR I

Paired TDD:
TTCCTTCCTTCC xxxx xxx

Confused? Read the full version here.