Yes. I only started in September but both consciously and unconsciously my accent has changed. I have thought for many years that my local accent is grim (that's not being snobby, seriously just listen:
[video="youtube;4KO85Cc1_k8"]http://www.youtube.com/watch?v=4KO85Cc1_k8&feature=fvwp&NR=1[/video])
so I made an effort to improve it starting when I was about 16. But coming to uni has made it exponentially better. Despite going to a Scottish uni the vast majority of my flatmates are southern with RP accents which is how I'd like to talk. So after listening to them day in and day out I picked up pronunciations and word choices from them both voluntarily and unknowingly.
But when I go home, it's generally "slightly" more local. Not too southern so as that people wish to beat me up for not being local (srsly, thank God I'm not black or I'd have been killed) but southern enough that occasionally people will comment "you don't sound like you're from here".
Although according to everyone that here's me for the first time I sound like some bizarre amalgamation of Irish, Geordie, Scouse, Scottish and Mancunian. Honestly, I've had all those descriptions used to describe my accent since September.
Edit: Although I should point out that the east Cumbrian accent is lovely, the west Cumbrian one sadly sounds horrifically uneducated.