Well... compared to Gotou or, say, Yu Asakawa --- Hirano is a little sprite, still not battleship class.
(I kind of miss Yu Asakawa, haven't seen her listed in a while)
Listening to Hirano do "haruhi" versus "konata" scores her some points in actually being able to do different characterizations (they're really very little alike). I'm more impressed by VAs who can actually do different voices or different personalities. If Hirano doesn't blow a gasket under the corporate stress to soar --- she'll really hit her stride in about five years.
Gomen, but I just feel like she *nailed* Konata's karaoke style.