B
Evidence Grade B
Graded
accuracy verified by the review judge
Safe to Cite
Current
98%
98% -- lead generation growth rate for Premier test prep company (redesigned website vs original site, A/B test run by Decoder Digital) (2026)
An A/B test of a redesigned site against the original site for a premier test prep company (Powerful Prep) resulted in a 98% growth in lead generation.
- Result had 96% statistical significance
Attribution:
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Lighthouse Research Team
Last verified:
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Source verified
Evidence graded
Value
98%
Unit
Percentage
Data Vintage
2026
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
Decoder Digital
Primary
Tier B
https://www.decoderdigital.com/conversion-rate-optimization/redesigning-site-make-sure-test-case-stu… ↗
Source Article
Redesigning Your Site? Make Sure You Test It! - Decoder
Big changes tend to have big impacts — and not always for the better. We’ve had a number of clients come to us after they redesigned their site… and then watched sales plummet.
So when we were approached by a premier test prep company to grow their business, we insisted on A/B testing the new site a…
Original Research
Decoder Digital
· Original study ↗
Methodology
A/B test of a full site redesign against the original site using redirects and customized Optimizely scripts; result reported at 96% statistical significance. Article provides no explicit date; collection year used as vintage.
Methodology documented
Segmentation
Industrymarketing
Cite this stat
Plain Text
Premier test prep company (redesigned website vs original site, A/B test run by Decoder Digital): 98% lead generation growth rate. Source: Decoder Digital (2026). Via Lighthouse Intelligence -- https://lighthousedata.io/data/test-prep-company-lead-generation-growth-98
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<blockquote cite="https://lighthousedata.io/data/test-prep-company-lead-generation-growth-98" style="border-left:3px solid #2563eb;padding:12px 16px;margin:16px 0;font-family:system-ui,sans-serif;background:#f0f4ff;"><strong>98%</strong> -- lead generation growth rate for Premier test prep company (redesigned website vs original site, A/B test run by Decoder Digital)<br><small>Source: Decoder Digital (2026) · <a href="https://lighthousedata.io/data/test-prep-company-lead-generation-growth-98" target="_blank" rel="noopener">Lighthouse Intelligence</a></small></blockquote>
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