Yes, there is a strong association between drinking coffee and reduced Alzheimer's risk.
A quantitative review of the data was published in 2007 that looked at the pooled data from four studies, published between 1990 and 2002.
- Quintana, José Luis Barranco; Allam, Mohamed Farouk; Del Castillo, Amparo Serrano; Navajas, Rafael Fernández-Crehuet, Alzheimer's disease and coffee: a quantitative review, Neurological Research, Volume 29, Number 1, January 2007 , pp. 91-95(5)
There was an obvious protective effect of coffee consumption in the pooled estimate [risk estimate: 0.73 (95% confidence interval: 0.58-0.92)]. However, the homogeneity test was highly significant (p<0.01), indicating heterogeneity across the pooled studies.
Although our pooled estimates show that coffee consumption is inversely associated with the risk of AD, the four studies had heterogeneous methodologies and results. Further prospective studies evaluating the association between coffee consumption and AD are strongly needed.
So, while they didn't find a risk reduction from the pooled data as high as 60%, as quoted by Lifehacker, they showed that the individual studies had found quite different figures.
So, it is quite reasonable to believe that Lifehacker had found (or at least had heard of) a study that showed a 60% risk reduction.