Are CAPTCHAs Getting More Difficult?

CAPTCHAs are a challenge-response test used to help decipher human responses from that of a computer in order to prevent automated software from performing actions which degrade the quality of service.  Recently I’ve noticed that CAPTCHAs are getting increasingly difficult.  Is this a sign of tech evolving faster than the human mind?

Related

Lorem ipsum dolor sit amet, consectetur adipiscing elit. Ut porta

Intel developing pollution “heat maps” enabled by sensors Smartphones may

Some interesting tidbits here from Akamai (with the full report