Yes they also seem to act as a local service from Lancashire into Mancashire
100% correct. I'm living in Chorley now so use these trains for their "proper" purpose of Intercity trains when I'm coming back up to Edinburgh or going to Machester Airport, and also for their "other" purpose of being the quicker commuter option to Preston, Bolton or Manchester.
They are cr@p as intercity trains and personally I think it's a disgrace that First have even been allowed to use them for what should be an intercity franchise (or is that an out of date BR phrase?!). They're also not great as commuter trains, mostly due to there not being enough carriages for the number of people using the service. Still much better than the Northern Rail alternative, which is still running Sprinters, and occasionally even Pacers if you get really unlucky. Northern also take longer of course, due to stopping at all the intermediate stations.
Scotrail is a kind of nirvana compared to trains down here, though at least there are loads of lines and stations I suppose so it's not all bad...