Just saw this:
$ Rscript -e \"sessionInfo()[\'basePkgs\']\" $basePkgs [1] \"stats\" \"graphics\" \"grDevices\" \"utils\" \"datasets\" \"base\" $ R
According to ?Rscript the methods package isn't loaded because, "The default for Rscript omits methods as it takes about 60% of the startup time."
?Rscript