According to this report from the communications regulator, the Irish postal service isn’t getting any better. In fact, fewer letters are being delivered the next day after posting than ever before.
ComReg0728.pdf (application/pdf Object)

The story never changes with this. There are continuous problems, and there is no sign of any improvement coming down the tracks. The government has done absolutely nothing to sort this out. The postal service is a critical national resource. Letter post may be less important than it used to be, but parcel and packet delivery is more important than it ever was.
The only way the regulator has of dealing with this issue at the moment is to sanction an increase in the price of postage. It’s been tried several times, but it doesn’t seem to work. Maybe it is time to try something different? At this stage, consideration has to be given to privatizing some of the work of the postal service once again (parts of the service were privately operated until the 1980s)