QUARANTINE — "60% of websites do not use facets and filters" / "only 10% of e-commerce sites use faceted sorting"

Quarantined claims:

• "60% of websites do not use facets and filters"
• "only 10% of e-commerce sites use faceted sorting"

Reason for quarantine: Vendor (HawkSearch / Nosto) assertions; could not confirm the specific percentages. The underlying Baymard usability figures ARE sound (Baymard Institute (2015) — sites with mediocre product list usability saw 67-90% abandonment vs 17-33% for sites with even a slightly optimised toolset) and should be used in place of these adoption-percentage claims.

Why we keep this note: The "most sites don't do this, so doing it is a differentiator" framing is appealing in sales decks — and exactly the kind of claim that gets repeated without checking. Discipline: use Baymard's abandonment delta as the magnitude citation, not these adoption percentages.

Source-incentive note: Both vendors sell faceted-search software — direct incentive to surface low-adoption claims that suggest the market is underserved.