"Wealthfront Equity Plan should result in approximately 3.5% to 5% annual dilution.. ..most public technology companies increase their option pools by 4% to 5%

"Wealthfront Equity Plan should result in approximately 3.5% to 5% annual dilution.. ..most public technology companies increase their option pools by 4% to 5% per year, so the proposed dilution is well within the reasonable range." Is this true? Dilution of this magnitude, on average?