'Del Shannon' was ranking above 'Shannon and the Clams' because
tier 2 (substring) had a neutral ×1.0 multiplier. Del Shannon's
MB score of 100 (Lucene considers 'Shannon' a full word match)
plus 588K listens gave him a base score of 98 — nearly untouchable.
Tier 2 now gets -5%, dropping Del Shannon to 93 while starts-with
matches like Shannon Wright (99) and Shannon and the Clams (90)
maintain their advantage. The logic: when the user types 'shannon',
results where 'shannon' starts the name are more likely what they
want than results where it's buried in the middle.
yonlu
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