Yes indeed, there are many Conservative rabbis whose conversions are upheld in Israel (the country, as well as the Nation/People). There are also a few Reform rabbis whose conversions are upheld, though they're fewer -- not because they are Reform, but because the majority of Reform rabbis do not demand mitzvot observance, and yes, this is according to the Reform Judaism platform, which you can read on
their website,not just misinformation spread by the "intolerant traditionalists."
I mention this because I think it's important to remember that the Orthodox and the Sephardi/Mizrachi/Teimani/Ethiopian/Indian communities do not reject Reform and Conservative conversions simply because the source is Reform or Conservative, nor do these communities accept all Orthodox or SMTE conversions simply because the source is Orthodox or SMTE.
The rejection or acceptance is truly on a case-by-case basis, and it is entirely based upon halachah:
* Does the rabbi demand mitzvah observance? (The interpretation of
how to observe is the difference, not the choice of
whether to observe.)
* Did the convert accept the mitzvah observance?
* Did the convert then proceed to do as promised, that is, to observe the mitzvot lifelong?
* And was the process documented so that it can be proven -- that is, is there a certificate of conversion, including the statement that mikvah immersion was witnessed?
If the answers to those questions is "yes," then the conversion is valid, regardless of the official affiliation of the rabbi in charge.