Google raises for most employees was between 0% and 1%
However if your sample is only people who are on Blind complaining, I can see how your data might be skewed in that direction.
"Mean raise for SI" is also not what the original post said. It just said "raises for most employees was between 0% and 1%". We can't exclude the higher performers.
Zero people on my team had raises below 1% (one was close). Nearly my entire team, including me, received SI for 2022. The merit lines make it clear what %MRP you'd need to be at to get a 1% raise and it is well above the norm.