speed vs copy — what actually moves the needle on conversions (real data inside)

figured id share this after arguing with a dev friend for like 3 weeks straight about whether fixing our page load time would do more than rewriting the headline and subhead. we ran a proper a/b test on a saas landing page doing around 4k visitors a month. took the page from 4.1 seconds load to 1.8 seconds - conversions went from 2.3% to 2.9%. decent bump, not gonna lie. then kept the faster page and rewrote the hero copy, shifted the value prop from feature-focused to outcome-focused. jumped to 4.7%. same traffic, same ads, same offer.

the speed stuff is more like removing friction than adding desire. you can have a 0.8 second page and still watch people bounce because the copy doesnt connect with what they actually want. ive seen pages with mediocre speed crush faster pages purely because the messaging hit different. speed gets you in the door faster but copy decides if they stay and convert.

my take is speed is table stakes past a certain threshold, maybe 2-3 seconds, and copy is where the real leverage sits. curious if anyone has seen it go the other way tho, where speed improvements outperformed copy changes significantly?

I think you already answered it in your post... maybe this isn’t really the best fit for comparison, more complementary instead

The copy is what gets you the conversation overall, how you’re able to convince people to buy from you

Page speed is good but it just makes it more convenient for them : )

Copy matters, never forget her. Good share.

copy matters sure, but id push back a little on the framing here. ran a landing page last year... wait no, ran a landing page a while back where i rewrote the headline three times, zero movement, then my buddy just compressed the images and got pagespeed from 54 to 91 and conversions jumped 18% without touching a single word. copy is the ceiling, speed is whether anyone sticks around long enough to read it