Comparing the two over all domains is ridiculous as this includes mass domains such as parked domains which can easily give Apache 10s of millions of useless stat points as one registrar switches a couple of servers.
The very last graph is the most sensible one which compares the two over the top 1 million domains and shows IIS to have a relatively stable share over time.
A better graph would compare the top 100,000 sites running on dedicated IPs or servers (no shared hosting accounts) that have existed for at least 6 months.
Comparing the two over all domains is ridiculous as this includes mass domains such as parked domains which can easily give Apache 10s of millions of useless stat points as one registrar switches a couple of servers.
The very last graph is the most sensible one which compares the two over the top 1 million domains and shows IIS to have a relatively stable share over time.
A better graph would compare the top 100,000 sites running on dedicated IPs or servers (no shared hosting accounts) that have existed for at least 6 months.