Ok, I think H1B is exempted from the 30/60/90 days rule here according to
this article:
For aliens who are interested in applying for a non-immigrant visa, there
are instances where the alien will encounter the issue of having to prove
his/her non-immigrant intent to the USCIS officer. Typically, before a non-
immigrant visa applicant’s application is approved, a consular officer (at
the U.S. Consulate/Embassy abroad where the application was submitted) must
first determine whether the non-immigrant actually seeks to enter the U.S.
permanently. This precaution is taken because under the Immigration and
Nationality Act [INA 214(b), 8 U.S.C. 1184(b)], there is a legal presumption
that all persons seeking entry into the United States hope to become
permanentresidents. Therefore, in order for the non-immigrant visa
application to be adjudicated, the applicant bears the burden of having to
prove “non-immigrant intent:” that he/she (1) has a residence abroad, (2)
has no immediate intention of abandoning that residence, and (3) intends to
depart the U.S. upon the termination of the visa. These guidelines apply to
non-immigrant visa categories, such as: B, F, E, J, M, O-2, Q, and TN.
However, the Immigration Act of 1990 exempted H-1, L-1, O-1, K, and P visas
from having to prove non-immigrant intent.