I have been to vegas recently, and while single decks are hard to come by, 'continuous shufflers' are rare and avoidable.

'Automatic Shufflers' which simply shuffle the shoe for the dealer are more common, but don't affect the ability to count.

Counting is possible, but difficult, and casinos are VERY on to it, especially when you try to make glaring advantage plays (splitting tens, eg)

And Yes, bringing down the house is a great read-

Lee