Brscmill,
CBJN does not list 6:5 crapjack games nor CSM games, so if a casino has 20 tables but only 5 are 3:2 bj dealt from a shoe, then CBJN shows the number of tables as 5.
Naturally, if the casino decides to eliminate their 5 real BJ games, CBJN will not know until they receive a report to that effect, same as if the casino changes the penetration or the limits. Note that while CBJN has reporters for various regions, any reader can submit a report, so if you visit the casino and notice that the felts on their 5 previously real BJ tables have all been changed to include the dreaded 6:5 notation and/or CSM's have infested the tables, by all means let CBJN know by email or by posting the information.
Because of the expense of changing the felts, casinos don't usually switch between real and fake BJ on tables that have the BJ payout printed on the felts. If you walk by a closed table and see "Blackjack Pays 3:2" printed on the felt, you can count that as a 3:2 table. If it says 6:5, you can count that as bad. Some sneaky casinos (is that redundant?) have begun using felts that do not display the BJ payout, instead using signage (electronic or physical signs) for the BJ payout, so if the table's felt doesn't say, you cannot tell on a closed table.
Moving CSM's is easier than switching felts, so on a closed table without a CSM actually parked there, you cannot be certain whether the table uses a CSM or not.
Typically, if the casino has a mix of real and fake BJ, the High Limit room is the most-likely location for their real BJ. Many casinos open their High Limit tables only during peak business hours, so after 6 pm on Friday and Saturday nights would be the time to check.
Hope this helps!
Dog Hand