Managed 1,303m at the weekend, but had to go 102 miles to find that many.
I'm using Mapmyride to measure elevation as I don't have a "smart" phone. Out of interest I put in a ride someone else had done on Strava, more or less (couldn't see exact start and finish points) and got it to be about a mile longer than their route, Mapmyride said 858m, but Strava said 1,047m, or 22% more
Either Mapmyride is very stingy, or Strava over generous.
Mapmyride seems pretty accurate for distances:102.27 c/w my Cateye at 102.22. and comparing a local hill with a gain of 79m on an OS map it was only a couple of feet out.
I don't suppose it really matters, as long as you stick to one method, but Mapmyride is certainly making it more difficult without going longer distances