I think that's a bunch of crap. It must be up to the DE.
I took my instrument practical back in january. for some reason (its too
involved to get into now) I wound up without enough hours (part 141
requires 35 hours). My instructor and the chief flight instructor
didn't catch it. i did the oral, and the next weekend after i made up
the 5 hours i was missing, finished the flight portion.

Robert M. Gary wrote:
I just called a local examiner to ask what will happen if the weather
isn't good enough to fly with my student tomorrow. He said that the
Sacramento FSDO recently told him that he is not allowed to begin a
checkride (i.e. do the oral) unless he believes there is a high
probability of finishing the entire exam. The result is that if the
weather is bad he CANNOT do the oral and save the flying for another
day. This sounds like a crappy policy to me. I always thought breaking
the checkride up was a great idea anyway.

-Robert, CFI