Hey JM,
Two maybe three weeks, it does pass. The great thing is Iv always found that when the old taste buds come back, they come back much better than before. I have found this to be reliable and repeatable, so there is great news coming out the other end, it just a matter of time and patience. Last time I had vape tongue I knew coming out of it would be awesome, and I was`nt disappointed.
Menthols and light tasting (flavorless) juices tend to help it past a little faster.