A citrate form is best for absorption
Capsules also work great!!
Yes. You will find that most tablets take longer to digest as they are coated. They also use fillers for the processing of them and to keep them in compressed state.
Generally speaking tablets take up to 20 to 30 minutes to digest and then go through the absorption process, liquids tend to take 10 minutes or so. The whole process of absorption is much better.