In reply to Ksharp.

It is related. The collinearities in my article are between data vectors. The CORRB matrix is an estimate of the correlations between the regression coefficients. If you have large collinearities between X1 and X2, there will be strong correlations between the coefficients of X1 and X2. However, the collinearity diagnostics in this article provide a step-by-step algorithm for detecting collinearities in the data. I am not aware of a similar algorithm for the CORRB matrix.