Good question Grar, to which there is not a definitive answer, because it can depend on trading platforms, network protocols, and broker software.
To be safe, assume probably!
Algorithms do target stop loss points, and thus can interpret implied stop loss settings.
Software systems like the RTD Tango execution engine does offer unparrelleled views into the level 1 and level 2 order book information directly on the exchange.
Here is an article by Henry Carstens in which he explains how such stops are natural targets for algorithmic programs that exploit assymetries in buying and selling orders.
