[andrewfong]

Yes, but now you get to bicker about how to structure the A/B test and whether the results are statistically significant.

[zyamada]

"Based on the data collected, most users seem to prefer..." is better than, "Based on my training and personal experiences, I think users would prefer..."

It is a lot easier to come to a common agreement on something as objective as statistical significance when compared to personal feelings and opinions.

[chrischen]

Subjectviely interpreted objective data...