Callis answered a question about Ovando in his latest Ask BA, would you say it's a fair assessment?
http://www.baseballamerica.com/today/prospects/ask-ba/2012/2613846.html
Yes for the most part.
Defense has really improved this year. Esp. route running. I have only seen him take one bad line to a ball this year, and he still almost got to that one. He is getting to balls this year that he might have let fall in front of him last year. He has played more games in RF (42) than he did last year (39) and he has decreased his errors from 7 to 2.
Arm: folks are not running on him this year. His arm is impressive. There are also less runners to test his arm on base as evidenced by the staff ERA of 3.81 this year compared to the 5.12 it was last year.
At the plate - much more aggressive. Has a big load and a big swing. Still averaging a strike out a game. But seeing improvement in bat control and two strike approach. The walk off hit that he had on Saturday night was a single to the opposite field. It was an offspeed pitch and he kept his hands back and poked it over SS into LF. Nice piece of hitting there.
He is hitting balls harder this year than last year. His BABIP on fangraphs (.404) will tell you he is getting lucky. I would tell you good things happen when you hit the ball hard.
Baserunning: He is arms and legs everywhere. It is not pretty to watch but he has such big strides the covers ground quickly. Takes him a while to get going. Only time he lacks any fluidity.
Make up: haven't had any direct communication with him so take this with a grain of salt. He doesn't always appear to be running out ground balls - this may be due to his long strides and taking some time to get going. Effort has been an issue in the past.
Overall - he is still 18 and won't be 19 until September. I hope he will keep up the progress he has made this year. He is still raw but there are glimpses that tell you he could be special.