A five-star average built almost entirely from a restaurant's opening month, before word of mouth or a busy dinner rush tested the kitchen, tells a different story than the same rating sustained for two years.
Volume matters as much as the average
A 4.8 average from 12 reviews is statistically much less reliable than a 4.4 average from 800 reviews. A handful of enthusiastic reviews from friends and family in the first weeks of opening can distort a small sample significantly.
Look for specific, repeatable detail
Reviews that mention a specific dish, a specific wait time, or a specific staff interaction are more useful than generic praise or complaints. “Great pizza” carries little information; “the pepperoni was crisped at the edges and the delivery took 25 minutes on a Friday night” tells you what to expect.
Watch for review clusters
A sudden spike of five-star reviews posted within a few days of each other, especially right after a slow period, can indicate an incentivised review push rather than organic feedback. It's not automatically dishonest — some restaurants run legitimate promotions for reviews — but it's worth weighing those reviews slightly less than ones spread naturally over time.
The single most useful review is rarely the most glowing one — it's the one that tells you exactly what to order and what to skip.
Weigh recency over total count
Kitchen staff, ownership and recipes all change over time. A restaurant with thousands of older reviews but only a handful from the past six months deserves the same scrutiny as a newer restaurant with fewer total reviews but a strong, sustained recent record.