Following the above tutorial, I clicked the Fields and Views button to add the fields, then added user_id="%%USER_USERID%%" to each field. Doing this resulted in the form in that attached image.
The fields for firstname, lastname, username and email are blank on the email notification.
Looking again at the tutorial, even though these fields were input when selected, I tried the format
[types usermeta='firstname' user_id="%%USER_USERID%%" user_is_author='true'][/types]
for each of the fields, but that didn't work either.