Making Taraweeh prayer lengthy

An imam leads people in taraweeh prayer and recites one page each
raka'ah, which may equal 15 verses. Some people say he prolongs
reciting, and some say the opposite. What is known from the Sunnah
regarding taraweeh prayer? Is there a way to know if it is long or not
according to the Sunnah?.
Praise be to Allaah.
It is proven in al-Saheeh that the Prophet (peace and blessings of
Allaah be upon him) used to pray eleven rak'ahs at night in Ramadaan
and at other times, but he would makethe recitation and other
essential parts of the prayer so long that on one occasion he recited
more than five juz' (sipara) in a single rak'ah, reciting slowly and
carefully.
And it is proven that he would get up halfway through the night, or
shortly before or after that, and he would carry on praying until it
was close to dawn, so he would pray thirteen rak'ahs in approximately
five hours. This requires making the recitation andother essential
parts of the prayer lengthy.
And it is proven that when 'Umar united the Sahaabah in praying
Taraweeh, they would pray twenty rak'ahs, reciting approximately
thirty verses of al-Baqarahin each rak'ah, i.e., roughlyfour or five
pages, so theywould recite Soorat al-Baqarah in eight rak'ahs, and if
they recitedit in twelve rak'ahs they would think that it was short.
This is the Sunnah in Taraweeh prayer: if the recitation is kept short
then the number of rak'ahs is increased to forty-one rak'ahs, as
someof the imams said. If a person wants to limit himself to eleven
rak'ahs or thirteen rak'ahs, then he should lengthen the recitation
and other essential parts of the prayer. There is no set number for
Taraweeh prayer, rather what is required is to pray in the time that
will enable you to attain tranquillity and not rush, no less than an
hour or so. Whoever thinks that this is too longis going against what
has been narrated and no attention should be paid to him.