It is shown that under certain regularity conditions the Bernstein-v. Mises approximation of the posterior distributions is of order $O(n^{-\frac{1}{2}})$ with high probability.
@article{1176343595,
author = {Hipp, C. and Michel, R.},
title = {On the Bernstein-v. Mises Approximation of Posterior Distributions},
journal = {Ann. Statist.},
volume = {4},
number = {1},
year = {1976},
pages = { 972-980},
language = {en},
url = {http://dml.mathdoc.fr/item/1176343595}
}
Hipp, C.; Michel, R. On the Bernstein-v. Mises Approximation of Posterior Distributions. Ann. Statist., Tome 4 (1976) no. 1, pp. 972-980. http://gdmltest.u-ga.fr/item/1176343595/