Anyway short mental prayers must be better than long distracted prayers.

Short fervent interior prayers are better than long distracted vocal prayers. But, given equally fervent prayers said with due attention, long ones are better than short ones. It is certainly better to give more time to prayer than less! And if distractions do present themselves, it is better to give up the distractions than to give up the prayers. Mental prayer is good, but vocal prayer is equally good if said well, and sometimes better. Thus Christ taught the Apostles a vocal prayer called the Our Father. So well did they learn it by heart that they were able to write it down years later word for word.

Radio Replies Volume 1 by Rev. Dr. Leslie Rumble MSC and Rev. Charles Mortimer Carty