I honestly case dealers now and make sure its "in stock". I've been given 3 month wait times on most items past their initial release dates (ex. releases October, ships February most times).
I've preorderd form very reputable people and delays ALWAYS happen. So if you really want something specifically you either wait, or shop around, and used is always a great option.
If it's in stock, again I haven't had issues, nor would I expect to. I've even gone international and as long as it's in stock, they can get it to me faster then local US dealer's can in most cases.
Happy hunting, and good luck!