I am receiving porcelain veneers. Was too much healthy tooth structure removed for these veneers to have a strong bond? (photo)

Since your are asking for porcelain veneers, unfortunately from
the photos, which is an impression of your prepared teeth, it
looks like the preparation was a little more aggressive for having
dental veneers.
These preparation are more for a 3/4 porcelain crown, rather than
veneers. The 1.5 mm is not supposed to be removed from the whole
body of your tooth but merely from the chewing edge of your tooth,
or the incisal edge, which is maximum recommended. The whole idea
to have porcelain veneers vs porcelain crowns is to salvage tooth
structure and bond to enamel for a stronger bond and hence
longer longevity of your porcelain restoration. Please keep in
mind that I have not seen your pre-op or before smile to determine
if these preparations by your dentist is conservative or not.
That being said hopefully your dentist has great knowledge
on dentin bonding protocol to make your porcelain restorations
last a long time. From the picture alone, I can predict that a lot
of enamel has been taken off, and there must be certainly lots of
dentin exposure and the prepared teeth are short,
solely depending on dentin bonding. Hopefully you do not have a
traumatic bite or occlusion, and if you do it is wise to relieve
the heavy bite from these porcelain restorations, you are about to
receive. Once the tooth is prepared unfortunately we can not add
enamel
to the teeth any more.
Good Luck.

Veneer preparation can involve just 0.5mm of enamel removal and in most cases there is still enough enamel.In some cases more preparation is involved if the teeth stick out etc.In my practice if the teeth are relatively straight then we can place veneers very easily and they can last up to 15 years!In some cases I recommend Invisalign to straighten the teeth so as to get a better result and also to reduce tooth preparation.When seeing a dentist always look at before and after cases and pay for a wax up of your existing teeth.In this case the photo does not show a wax up but a model of the prepared teeth, which does look like 1.5mm preparations.

Reason I ask is because sometimes more tooth reduction is needed if there is existing bonding, decay, or other things.    Also, the amount of reduction depends on where you started.  If your teeth were really flaring or crooked...then more reduction is necessary to achieve proper arch form and the cosmetic effect.   Without seeing x-rays and pre-operative photographs it's hard to tell.  I have to say- one of the biggest problems in cosmetic dentistry though is UNNECESSARY tooth reduction.  When there is not a clear "road map" for most dentist they'll just "create room" so that the ceramist can fill it in.   Rather than getting the dreaded call from the ceramist "Hey Doc, you didn't leave me enough room"  - which then requires the process to, essentially, start over.  

i am an orthodontist , so according to me best way to get teeth align is braces, because by that i m preserving natural tooth structure,  when i start any of my veneer case , i always tell my patient " YOU R KILLING YR NATURAL TOOTH STRUCTURE". so u have to remember this. also much more care is required. in yr case prep is little more, but its already done, so can't do anything. sometimes more prep is required in maligned teeth. for minimum reduction go for veneers followed by ortho treatment.

It is true that bonding to enamel is stronger than to dentin howeveras long as there is enough surface area which appears in your photothen you should be ok.  It is hard to determine from your photo howmuch tooth structure was removed and the reason for the removal.If your dentist was correcting mal aligned teeth or needed to compensatefor a rotation of a tooth then that type of preparation may be necessary.Please post the photos of your veneers after they are bonded.