Maybe 3 years is on the conservative side but when you consider the following:

OTS - 12 weeks
UPT - 52 weeks
MWS training - 12-26 weeks
SERE - 2 weeks
Unit mission qual training - 6-12 weeks

If you take the minimum amount of time above you are still looking at 1.5 years just to be considered a "weekend" reserve pilot. Guaranteed, there will be breaks in time between each one of these events, often measured in months and not weeks.

I'm not trying to discourage you, but recruiters will tell you anything in order to get their quotas met.