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

I have always traveled. I grew-up an Army Brat (Horrah!)

Both Lessien and John Gruber take on the topic of

Gartner is predicting consumers will store more than 1/3 of