Are some harder, yes.
I was emailed your post from a former student of ours who just completed the 2003 MCSE track. In our orientation, one of the first things we tell our students is NOT to use brain dumps, third party, testking, etc. This is not true learning. The answers they present are from a pool of people who have tried to research the questions posted on these forums.
Here is what is happening currently in the 2003 track:
70-270 Passing 700, Max score 937 (we found this out from a student in our last class who had scored perfect on each subject)
70-290 Passing 700, Max score 755
70-291 Passing 700, Max score 800 (we have never seen higher than a 745)
70-227 Passing 700, Max score 900 (we hae never seen a higher score than 899)
70-293 Passing 700, there are 2 versions of this test. One you can get a max score of 800, the other 1100.
70-294, Passing 700, Max score of 755
70-297, Passing 700, Max score unknown. Highest we have seen is 838
As you can see by the numbers, Microsoft is not giving much room for error. The reason for this is companies such as Testking and MCSEbraindumps, who steal the exam material and try to sell it on the internet, only to produce the "Paper MCSE".
I completely agree with you. If Microsoft changes the exams so often, how can the books out there help you? Additionally, Microsoft admits that their own material alone cannot help you pass these exams. You must supplement it somehow with experience and other materials.
On one hand, I must agree with what Microsoft is doing in order to avoid putting paper MCSE's out there. But on the other hand, as an MCSE instructor myself, I must admit that some of subjects being tested are very unfair and have forced several to persue other certifications.
Is this track passible? Yes. We have been running the 2000 MCSE/MCSA track for years along with the other schools and have shown a large percentage of certifications, 2003 is new and will continue to change for some time. However, even with the changes, we have seen a good passing rate, but with more work involved.
The key is not trying to find the questions and memorize answers. Find the tools, get the concepts.
I would suggest researching a boot camp type company that has the experience and the tools to ramp you up on the information and subjects required to pass these exams.
Good Luck with your certification quest!
Richard