Yes nicotine is absorbed in that way. You may get slightly less nic than the lungs as they are designed to get substances directly to the bloodstream, but it will work just fine. Nicotine can be absorbed through the skin as well. Thats why nic patches work and why getting high test
juice on you fingers should be avoided.
edit: just looked into it a little more and it appears that the Ph level has a lot to do with the percentage of nicotine that can be absorbed. (example: cigarette smoke is acidic so doesn't allow much nic in the smoke to be absorbed) And surface area determines how quickly nicotine can be absorbed. (the large surface area in the lungs allows much more absorption than the mouth) So you will get much more nic absorbed in the lungs because of the huge surface area. The mouth will still absorb nic though. I Don't know the specifics of nic delivery through
ejuice...I'm guessing similarly.