As a current Jarratt Resident:
STEADY ON!!! We're not a bunch of isolated loners!!! Honest!!! Jarratt Has a capacity of 620 students. This year, just under 100 were freshers, and this september, there will be 94 Freshers. Admittedly, the rest is made up with international students & Postgrads... but as there aren't that many freshers, we all know each other really well, and get on fine... The problem with some of the other halls, like Shack, is that they're enormous, and it's hard to get to know people well enough.
I personally think Jarratt is awesome, I'm in a self-catered, en-suite, mixed flat of 5. We've got 4 pubs we frequently use, between a 2 minute walk, and 5 minute walk away. We are right next to the campus, and we are linked to the hallsnet phone service.
Douper isn't the only hall around us, There's Victoria Halls which are much closer.
One other advantage Jarratt Has over the other halls, are the events organised by the Resident's association. [By the way... I'm Treasurer for Jarratt R.A. so if you're a fresher here, I (or one of the Freshers Crew) will be the first people you see/ meet at uni] The Resident's association gets £104 per capita per annum, with 620 people, that's a £60k budget we have to play with. We organise events in freshers week, and after, such as trips to alton towers, go-karting, paintballing, bowling, balls, BBQ's, new benches, change machines, bar crawls, bar tabs, clubnights, you name it, we can probably do it. The Money we recieve is meant to be spent on all the residents, but as hard as we try, none of the international students/ postgrads come out to play... So we essentially have £60k between 100 people.
[And no, you can't just have the money]
Conclusion: Go Jarratt!!!