Within the qiraa'at of Hafs, are madd elongations supposed to be exactly the same per recitor e'g madd tabiee 2 counts?

Question
 Bismillaah

Assalaamu 'alaikum warahmatullaah

Say within the qiraa'at of hafs are madd elongations supposed to be exactly the same per recitor e'g madd tabiee 2 counts, the counts should be exactly the same time for all recitors or does the lengthening differ according to the pace of the individual recitor?

JazaakAllaahu khair

Wassalaam

Answer
Wa alaikum assalaam wa rahmatullahi wa barakatuh,
The timings of the lengthenings or mudood, are based on the timing of one harakah (which is the Arabic word for vowel), then multiplied by a number based on the vowel timing.
One reading at a fast pace will have faster timings of individual harakaat (vowels) than one reading at a slower pace.  The mudood then are not equal in length from reciter to reciter unless there are two reciters reading at the exact same speed.  Instead the mudood length will be a mutliple of the speed of the individual vowel counts and this speed with determine the length of the medd. 
The natural medd or   is two vowel counts; so the reader lengthens it based on the speed of an individual vowel,  multiplied by two (i.e., two fathah).
The reader of the Qur'an must make each vowel count equal to the other in his/her reading.
The speed of reading that one adopts is based on ones abilities and circumstances.  In front of a teacher, one usually reads slowly and deliberately so the teacher can correct and hear all the letters clearly.  If one is reviewing by himself/herslf a large portion by of the Qur'an, the speed may be a bit quicker. 

Wa iyyaakum wa-l-muslimeen.
Wa assalaam alaikum wa rahmatullah.