QUOTE(pitcher54 @ May 31 2012, 08:34 AM)
You do not mention which instrument you play, that may be relevant. My piano students do not use ABRSM scale books, so they have no preconceived ideas about how they look or how they should be played. I use a system based on letters and numbers and, like you, I teach students to play scales in even quavers, stressing the idea that I should not be able to tell when the thumb has tucked under, or the fingers have crossed over.
From an examiners' point of view, prompt response, accuracy of notes, fluent delivery, and an appropriate tempo for the grade are all essential to get high marks, and a sense of musical line is a bonus. This must surely be true for all instruments. There is nothing in the rubrics about rhythm.
If you do not have it already, I suggest you obtain a copy of 'These music exams' by Clara Taylor, an ABRSM publication, and have a look at page 40.
Er...there may be nothing in the rubrics about rhythm for pianists, certainly. BUT
For strings there are these requirements :string scale patterns
Woodwinds are different again - for example woodwind dominant sevenths finish on the dominant not the tonic.