The acaryas have explained that these six categories(utsaha-mayi, ghana-tarala, vyudha-vikalpa, visaya-sangara, niyamaksama, taranga-rangini) of unsteady devotional service only to help us look at ourselves. Don’t spend time trying to categorize the advancement or perceived lack of advancement of other devotees. Try to understand how to make spiritual advancement. Having come in contact with bhakti-yoga, be very, very careful that you do not lose this rare chance to love, which is available only in this human form of life.
(LFD, Vol2, Being Careful to Avoid Anisthita-bhakti, Pg 55, 5th paragraph)