B
Evidence Grade B
Graded
accuracy verified by the review judge
Safe to Cite
Recent
10%
10% -- users lost per additional load second for BBC (2025)
The BBC reported that they lose 10% of users for every additional second their site takes to load.
Attribution:
View source
Lighthouse Research Team
Last verified:
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Source verified
Evidence graded
Value
10%
Unit
Percentage
Data Vintage
2025
Entity
Evidence Quality
B
Strong, reliable evidence
Sourced from a well-regarded research firm or industry leader with transparent methodology and a reasonably large sample.
Single source - not yet corroborated
Score breakdown
Extraction
75
Source Trust
60
Citation Chain
20
Independence
30
Methodology
45
Freshness
95
Source
BBC
Primary
Tier B
https://www.techseovitals.com/blog/how-core-web-vitals-boost-your-conversions-and-revenue/ ↗
Source Article
How Core Web Vitals Boost Your Conversions and Revenue
Think about your last frustrating website experience. A page that took forever to load. A button that refused to respond when clicked. Content that jumped around as images appeared. These are not just minor annoyances. They represent significant barriers to your business growth.
Core Web Vitals have…
Original Research
BBC
· Original study ↗
Methodology
BBC reported case data
Methodology documented
Segmentation
Industrymarketing
Cite this stat
Plain Text
BBC: 10% users lost per additional load second. Source: BBC (2025). Via Lighthouse Intelligence -- https://lighthousedata.io/data/bbc-users-lost-per-second
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<blockquote cite="https://lighthousedata.io/data/bbc-users-lost-per-second" style="border-left:3px solid #2563eb;padding:12px 16px;margin:16px 0;font-family:system-ui,sans-serif;background:#f0f4ff;"><strong>10%</strong> -- users lost per additional load second for BBC<br><small>Source: BBC (2025) · <a href="https://lighthousedata.io/data/bbc-users-lost-per-second" target="_blank" rel="noopener">Lighthouse Intelligence</a></small></blockquote>
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