Number goes high, as most people try within the limited time span of 2-5 minutes!!!
Entries are made & Transaction are processed & the outcome awaited!!
Some out of many hundreds get CNF, making WL high!!
High Tatkal do have less chance, as Earmarked Quota (HO/LB etc) art that much in count (as Tatkal is highest & biggest quota).
Further...
more... coach augmentaton isnt assured!!
Earmarked Quota & Extra Coach is where Tatkal comands!!