Google announced today on its Mobile Ad Blog that the full TrueView ad experience will be coming to YouTube mobile apps in the same way that it has rolled out to desktop users. TrueView is Google's fancy way of saying that users can skip a pre-roll advertisement after a short period of time if they don't like it. This provides both a better ad experience to the end users who don't want to see terrible ads and better feedback to the companies buying ad placement on videos.
The post points out that implementation of TrueView is still in testing, but early indications are that it is having the same positive effects that were seen when it was implemented on the desktop. Be sure to let us know in the comments if you're starting to see skippable ads in your videos.
Source: Google Mobile Ad Blog