Rabbi Avi Weiss is strictly observant, believes in Torah Mi Sinai, presides over a Orthodox Union member shul with Orthodox services conducted with mechitzahs separating the men from the women, does not permit women to receive aliyot or count for a minyan, is a member in good standing of the Rabbinical Council of America and the Vaad HaRabonim of Riverdale and tells his shul members to adhere to the Vaad’s kashrut, strongly supports Orthodox institutions in his own community, and defends Orthodox hashkafic positions in front of sceptical audiences. He also says that the ideal career for a bright young Jewish man is in the rabbinate rather than a profession like medicine or law.
Sounds Orthodox to me.
If you show up for a morning minyan it is quite likely that someone will actually say “hi” to you. And if you are a man who is new to observance, someone might help you to put on tefillin. And if you are unfamiliar with Aramaic and struggle to say kaddish, they will help you out by prompting and not rushing through the prayer.
EDITED