Yes, it's been weird about information regarding
DCL transport varying. Here's what I had received back from my inquiry to Disney almost 2 weeks ago:
"If you are flying into Houston/Hobby International Airport, you will
need to seek other transportation options to/from the cruise terminal in
Galveston."
So those who have the option for ground transportation from Hobby for their cruise date - definitely be thankful!

It really isn't a bad drive down Interstate 45 to the port.

Also, Hobby has lots of nice eating options inside the terminal. We arrived Friday and had to wait about 90 minutes before my college roommate could pick us up, so we walked the terminal and had a snack.
When logging into my Nov 3 Magic cruise online just now, and clicking on "Air & Ground Transportation", there is no mention of Hobby unless I am overlooking it:
"Air and Ground Transfers for U.S. Travelers sailing to the Caribbean
Guests embarking on a
Disney Cruise to the Caribbean will fly into George Bush Intercontinental Airport and then take a motor coach to the Port of Galveston.
Guidelines for Air Transportation
Guidelines for Ground Transportation
Prior to your vacation, you'll receive a Documentation Packet that includes your Guest Travel Booklet with vouchers and special luggage tags. Attach the tags to your luggage and bring the Travel Booklet with vouchers to the airport where you'll check in your bags for your flight.
Upon arrival at George Bush Intercontinental Airport, go directly to baggage claim where you will pick up your luggage. A
Disney Cruise Line Representative will be available outside of the Baggage Claim area to direct you to your designated transportation. Be prepared to present your Guest Travel Booklet. From the airport, you'll be transported to the Cruise Terminal. You'll return the same way to the airport at the end of your cruise.
Ground transfers are also available for Guests who have arranged a hotel stay through Disney Cruise Line before or after their cruise.
Transportation options may be a motor coach, mini-bus, or taxi depending on arrival time and party-size.
For more information, call (800) 951-3532. Guests under age 18 must have parent or guardian permission to call."