Yes, much weaker and slower. Aliens still dart about from wall to wall or cover to cover when shot at, they sometimes walk towards you before being shot to shreads. They don't grasp firepower until they are under fire or already know it's there.Their game counter-parts are balanced to fight Marines, that's the difference.
On the flip side, they should 'grab' players, not scratch them like angry cats. It should be a grip you cannot escape from, QuickTime events where you are pulled under doors, through vents and killed either immedently or slaughtered for a few seconds would be more realistic to the films and add a stronger sense of fear. Being able to kick, wack and shove them in AVP wasn't realistic to the films. Which is interesting because all the NPC's in these games get caught by Aliens and slaughtered quickly but the player does not have to worry about such events.
Back to the trailer in question you'll notice the aliens are attempting to attack Marines head on, some jump off walls or run right up and get cut down. It's true to the film.