<p>I've been looking at some UK universities during my gradschool search and I wondered why the UK PhD program was only 3-4 years as opposed to the 5-6 years in the US. My guesses are:</p>
<p>1) The US PhD program is actually a PhD+MSc program. So if you cut out the approximately 2 years of MSc work, the "real" PhD program is only 4 years. </p>
<p>2) Most US students, from what I understand, do RA/TA work, while this seems to be rare, at least less common, in the UK. So I assume UK students work full time on their PhD.</p>
<p>3) Even though they only ask for a BSc as the minimum requirement for entry into a PhD program in the UK, they seem to expect you to have a good knowledge of the field and a good level of research experience. Notice that for US admission they ask for a personal statement while in the UK they ask for a full research proposal as part of the application.</p>
<p>4) Especially as an overseas student, it seems difficult to get funding unless you have an MSc. Most scholarship schemes I've seen say that you need an MSc to have a fighting chance for the scholarship. </p>
<p>(This is not to deter you in anyway; If you're capable of applying for MIT, then you're definitely capable of applying to top UK universities along with a scholarship. I'm just not in that league. Perhaps I can get an MSc first and then I might be able to apply to a top UK/US program. :D )</p>
<p>As for prestige, it is true that the top PhD programs are in the US, but if you take out the top 5-6 programs (MIT, Stanford, Berkley, Carnegie-Mellon, etc) my guess is that the top UK universities, such as Oxford, Cambridge, Imperial, Southampton, Edinburgh would fall along nicely with the US programs - though probably the lower ranked UK programs might be a bit less valued than the US ones.</p>
<p>Incidentally, I happen to notice this page recently:</p>
<p>Cornell</a> Computer Science - Faculty</p>
<p>You notice that along with professors from MIT, CMU, there are also professors from Surrey(UK), Birmingham(UK), Waterloo(Canada), Toronto(Canada), Tel Aviv(Israel), Buffalo(US), and German and Hungarian universities I've never heard of. So I guess the moral of the story is that ultimately what really matters is the research you do. And many applying-to-graduate-school-guides I've seen stress the importance of the adviser over that of the university.</p>
<p>This is of course, my guesswork based upon my gradschool search.</p>