The Wales international was drafted into the first team after injury to regular No.1 Ben Foster, and the 30-year-old has helped the side move up the table, with the Baggies recording just one defeat in seven league games.
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"Boaz made a couple of really good saves on Saturday," he told the club's official website. "Even last season, Ben knew he had to work hard and be on top of his game because Boaz is an accomplished international goalkeeper.
"He's shown that since we lost Ben in the second game of the season and defensively we've been strong and solid. To achieve that, you need to have a good goalkeeper.
"With the exception of the game at Liverpool, when some of their finishing was sublime, I think Boaz can be really pleased with his contribution this year."
The manager refused to be drawn on whether Myhill will keep his place when Foster, who is recovering from a foot operation, will return to the starting XI when he resumes full training.
"We'll have to wait until Ben's back and then we can start talking about these things," he added. "I'm not going to go down the line of speaking about Ben coming back to put pressure on Boaz etcetera."