Omniture ne ofera cateva date legate de numarul real al utilizatorilor logati la search:

Google engineer Matt Cutts estimates that search encryption will impact less than 10% of organic search queries.
To date we have seen that 0.5% to 2% of Google searches are affected, though we expect that number to increase. As a percent of total search traffic, we’ve seen a 0.3% to 1.5% impact.
Adobe: Industry Insights » Blog Archive » The Impact of Google Encrypted Search