OH BBMom,
The question of whether the situation is "unusual" depends on defining "unusual" to whom and in the context of D3 baseball.
Looking at this from the context of a scout, I would say no, it is not unusual, for a scout who is really doing their job. As I have posted before, I relied, a lot, on bbscout when our son was involved in the process through D3. bbscout described how MLB scouting is so much different than college scouting. A scout gets paid to find talent at every level and in every area and those who don't, get fired.
With the area where your son's team is located and the high profile programs, including your son's, I am not surprised and don't find it unusual scouts would be at a scout day and pick out players/pitchers from top programs to follow.
Looked at from the perspective of D3, the situation is somewhat "unusual." D3 baseball has anywhere from 12 to 25 players/pitchers drafted each year. The majority are pitchers, as is the case at DI and DII, JC and Naia, also. So, I guess it is "unusual" in that the usual is close to 99% of D3 players/pitchers don't get drafted.
But, to support what TPM described, there is a very big difference between being scouted and the next steps.
Very few D3 players get drafted after their junior year. Most are senior signs. Far more players/pitchers get scouted than drafted and even during the draft, there can be some expectations created by MLB teams which get crushed when names are not called.
For your son and family, the odds are against him and it is important to know that.
It is also important to know the process is just starting, it is very early, and the odds are stacked against this being meaningful for the 2013 draft.
Finally, it is be far better to have 20 scouts interested rather than one. But having a start with one is something which does not happen too much at the D3 level.
Hopefully, some of these thoughts could be helpful is keeping your son's head out of the clouds. It would not be helpful for him to see this as "unusual." It is part of a long process with final decisions to be made by folks he likely won't ever meet.
MLB teaches players in Milb to focus only on what they can control, which is what they do on the field, in preparation to get on the field and in the weight room. Your son needs to pay attention to those and work very hard to get better every pitch, every inning and every game.
He must work equally hard in the classroom.
With all this said, congratulations to your son. This is a "start" and the finish line, if reached, is likely very, very far away. Learning about the reality of the process, combined with what he does everyday between now and "very, very far away" and likely feedback from his college coaching staff, or all of the above, will likely get his head out of the clouds.
Thanks for sharing. I love it when this happens for players/pitchers in D3 baseball.